HomeMy WebLinkAbout2000-06-27 - AGENDA REPORTS - SCV WATER RESOURCES (2)NEW BUSINESS
DATE:
SUBJECT:
DEPARTMENT:
CITY OF SANTA CLARITA
AGENDA REPORT
City Manager Approval
Item to be presented by: Jeffrey Lamb
June 27, 2000
SANTA CLARITA VALLEY WATER RESOURCES
Planning & Building Services
RECOMMENDED ACTION
City Council to receive and file the Santa Clarita Valley Water Report 1999. Direct staff to
return annually with an evaluation of the report as prepared by the Upper Santa Clarita
Valley Water Committee.
BACKGROUND
In response to concern expressed by the public regarding the reliability of and demand for
water in the Santa Clarita Valley, Council directed staff to examine the current and future
estimated water resources and report on the findings. The Santa Clarita Valley Water
Report 1999 (Report), prepared by the Upper Santa Clarita Valley Water Committee
February 2000, is submitted for informational purposes and reports on the reliability and
quality of water supplies to serve existing and planned near-term development in the
Valley. The Upper Santa Clarita Valley Water Committee (USCVWC) coordinates the use
of water in the area and is comprised of the Los Angeles County Waterworks District 36,
Newhall County Water district, Santa Clarita Water Company, Valencia Water Company,
and the Castaic Lake Water Agency. The Committee retained Luhdorff & Scalmanini
Consulting Engineers to review the 1998 Report, recommend technical additions, and assist
in preparation of the 1999 report.
During 1999, CLWA purchased 41,000 acre-feet from the State Water Project (SWP), thus
increasing CLWA's annual water entitlement to 95,200 acre-feet, and acquired the Santa
Clarita Water Company. The total 1999 water supply in the Valley was reported as
ranging from 156,900 to 142,800 acre-feet per year (AFY). The total 1999 water demand in
the Valley was reported as 87,010 AFY (and includes existing demand, LA County projected
DMS demand, and projected agricultural and miscellaneous demand). Therefore, the total
1999 estimated water surplus was reported as 69,900 to 55,800 AFY.
Water Supply: Alluvial Aouifer
The 1999 Report finds that groundwater in the Alluvial Aquifer is unconfined, and the.
amount in storage can vary considerably because of the effects of recharge and discharge
from the aquifer. Three out of the four water companies pump groundwater from the
Alluvial (LA District 36 does not currently pump), as well as Los Angeles County and
APPROVED
Newhall Land & Farm to service their own lands. Based on the 1986 Slade report and the
operating experience of the Committee's members, the committee adopted a perennial yield
of 32,500 acre-feet per year. The perennial yield is the annual amount that can be pumped
on a long term basis without causing an overdraft, and includes fluctuations above and
below the perennial yield amount during wet and dry year conditions. This amount is
constant with the 1998 report.
In general, groundwater levels throughout the Alluvium have been higher over the last 20
years than was consistently the case of the preceding 30 years. As reported in the Report,
on a long-term basis (over the past 40-50 years), the Alluvium has shown no signs of water
level -related overdraft. Groundwater quality variations are common and are inversely
correlated to precipitation and stream flow: wet periods produce substantial recharge of
high quality water and dry periods have notable declines in water level as well as increases
in TDS (total dissolved solids) in the deeper parts of the Alluvium.
Water Supply: Saugus Formation
The Saugus Formation is considered a confined groundwater supply. An accurate perennial
yield has not been determined since information on the characteristics is limited (additional
wells need to be drilled and pumped). The 1988 hydrogeologic assessment of the Formation
(Slade, 1988) estimated a potential annual recharge rate between 11,000 and 22,000 AFY,
and the principal recharge sources are direct precipitation on exposed deposits and direct
infiltration from the overlying saturated Alluvium. For long term planning purposes, the
Committee adopted an annual recharge rate of 20,000 AFY since the 1988 estimate was
based on part on the water levels in the overlying Alluvium and in light of higher water
levels in the Alluvium over the past 30 years. This amount is constant with the 1998
report. From 1980 to 1998, total pumpage has ranged from 3,850 AFY ('83) to almost
15,000 AFY ('91), averaging 7400 AFY; the majority of pumpage from the Saugus (93%) is
for municipal supply.
Water Supply: State Water Proiect (SWP)
CLWA has a contractual entitlement to purchase a total of 95,200 AFY from the State
Water Project. The entitlement is 41,000 greater than in the 1998 report and reflects the
1999 acquisition of additional entitlements from the Kern County water agencies.
Annually, CLWA can request up to 100% of the total entitlement, however, actual water
delivered is determined by many factors, including rainfall and snowmelt in northern and
central California. To manage water supply in dry or draught years, the Committee plans
to utilize other supply firming resources in dry years to compensate for reduced SWP
supplies. Although the Supplemental Water Purchase Program, Interruptible Water
Service Program and SWP Turn -back Pool are referenced in the Report as viable programs
to supplement reduced SWP water delivery, more detail should be included in the Report as
to the potential quantity, reliability, and availability of these sources.
Water Supply: Reliability
Locally, water reliability is enhanced as an area develops multiple sources of water
supplies. Many mechanisms and agreements exist to ensure reliability in times of draught
or low precipitation. The Monterey Agreement (1994) allocates water among the 29 SWP
contractors during times of shortage. CALFED Bay -Delta is a cooperative State -Federal
process with the goal of developing a long-term solution to competing water needs of the
Sacramento -San Joaquin Delta (three phased effort, currently in a draft of phase II).
Governor Gray Davis and the Secretary of the Interior Bruce Babbitt recently unveiled a
long-term framework to enhance the CALFED Bay -Delta Program which will enhance
water supply reliability and long-term stability. CLWA's Long Term Capital Improvement
Program identifies includes the purchase of additional SWP entitlements (when demand
approaches exceeding supply), groundwater storage in/outside the Valley, water purchases
from the state's Draught Water Bank, and short-term exchanges with other agencies on an
as -needed basis.
In addition, the Committee has identified firming supply sources to supplement available
water from the Alluvium, Saugus and SWP sources. The Committee's dry year planning
scenario plans for approximately 50,000 acre-feet of firming supplies to be available
annually for up to three years (excludes the 10% voluntary conservation) if/when SWP
supplies are reduced. These firming supplies consist of 20,000 acre-feet of additional
groundwater from the Saugus and up to 30,000 acre-feet water purchase from the Sate
Draught Water Bank. Although the Report identifies local augmentation firming programs
such as voluntary and mandatory rationing, and conjunctive use of stored local ground
water, additional detail could be included in the Report to demonstrate the planned impacts
on supply. Specifically, additional information should be included as to the estimated
quantity of water to be gained through these programs and the estimated costs to the water
users for these programs.
The 1999 Santa Clarita Valley Water Report identified the total existing purveyor and
projected future demand (as identified by Los Angeles County's DMS) as 87,010 AFY. Also
included in this total demand figure is other future demand estimate (long-term
agricultural and miscellaneous use) which was reported as 7,100 AFY, although 1999
actual use was 17,174 AFY. Based on the information provided in the Report, the valley's
total 1999 water supply exceeds total projected future demand by about 61,000 AFY.
Source of Water Supply
(A)
1999 Supply
(B)
1999 Supply @
SWP 50%
Alluvial Aquifer
32,500 AFY
32,500 AFY
Saugus Formation
20,000 AFY
20,000 AFY
State Water Project (SWP)
95,200 AFY
47,600 AFY
TOTAL Water Supply
147,700 AFY
100,100 AFY
Purveyor Demand
57,250 AFY
57,250 AFY
Development Monitoring System
22,660 AFY
22,660 AFY
Subtotal Purveyor's Demand
79,910AFY
79,910 AFY
Other Water Demand
7,100 AFY
7,100 AFY
TOTAL Water Demand
87,O10AFY
87,O10AFY
Est. Water Surplus/(Deficiency)
60,690 AFY
13,090 AFY
In the chart above, the amount indicated for each water supply source is the annual
perennial yield used for long-term annual pumpage estimates. Column A assumes that the
imported water from the SWP entitlement is 100% reliable. Column B discounts the SWP
entitlement by 50% and illustrates that existing supply is still sufficient to meet total
projected demand based on 50% reliability of the imported water. In both scenarios,
reliability to meet total valley demand is demonstrated.
Water Quality
Overall groundwater quality in the Valley is considered good and meets EPA and California
Department of Health Services (DHS) drinking water standards. However, the City may
want to work with the purveyors to ensure consistent, high quality drinking water across
the City. NO MTBE has been detected in any of the valley's drinking wells, however, some
wells in the Saugus Formation have tested positive for perchlorate (Whittaker-Bermite site
is potential source). Although no federal or state standards exist, California Department of
Health Services has established a provisional action level of 18 parts per billion until the
EPA proposes a standard. It is important to note that no Alluvium wells have tested
positive for perchlorate since the Alluvium is a major source of recharge for the Saugus.
During recent Public Utilities Commission hearings (May 2000), Richard C. Slade, noted
geologist and hydrologist, testified that of the 12 Saugus wells in the Whittaker-Bermite
region, two Santa Clarita Water Company wells have been voluntarily placed on inactive
status due to perchlorate testing between approximately 12 and 45 parts per billion. In
addition, Valencia's well No. 157 has tested for perchlorate in the range of 14 parts per
billion, however, the Valencia Water Company has never received notification from DHS to
shut down No. 157 or any other municipal supply Saugus well. Therefore, (with the
exception of one well which is out of service for non -perchlorate issues) all other Saugus
Formation wells are considered active and available for use.
Members of the community have expressed concern for the Committee's inclusion of the
Saugus Formation in the Valley's base water supply as well as its designation as a
substantial firming resource in dry years because of the perchlorate contamination issue.
However, since the Saugus is a "folded" basin and is made up of bedding planes that are
bifurcated by the San Gabriel and Holser faults, some experts argue that the perchlorate
contamination is confined and unlikely to spread to other parts of the basin. Slade also
testified in the May hearings that locations on the east and west sides of the I-5 and
between the San Gabriel and Holser faults would be viable locations capable of supplying
usable groundwater for municipal purposes. As was mentioned earlier, no Alluvium wells
have tested for perchlorate. Due to frequent testing and multiple wells, an indication of
perchlorate in an Alluvium well will serve as an "early warning system" to aid in detection
of additional or changing areas of contamination. The City should closely monitor both the
clean up of the contaminated areas, as well as any further spreading of contamination in
the Saugus.
Water Demand
Total current use and projected demand in the Valley for 1999 was reported as 87,010 acre-
feet. Table IV -I from the Report is recreated and amended below to illustrate the amount of
current demand from the purveyor, agricultural and miscellaneous use and the projected
future demand (LA County DMS report dated January 19, 2000). The 1999 purveyor use
reported in the table of 57,250 AFY is 8,392 AFY greater than the level of demand reported
in the 1998 Report. It is important to note that although the total amount of 1999 demand
for "Long Term Agricultural and Miscellaneous Use" is 17,174 in the Report (see chart III -6
in the Report), the total amount for 1999 use in this category of the table was reported as
7,100. CLWA's Integrated Water Resource Plan states that agricultural irrigation demands
are expected to decline from about 12,000 AFY to 5,000 AFY in the future. An additional
2,100 AFY was added to the long range agricultural use estimate of 5,000 AFY to arrive at
the long-term planning figure of 7,100 that is reported in Table IV -I. However, total
existing demand in 1999 for agricultural and miscellaneous use is understated by
approximately 10,000 AFY and should be revised in the Report.
Included in the current use amount of 17,174 is current agricultural demand of
approximately 14,000 AFY for Newhall Land & Farm. Since Newhall Ranch has not been
entitled, the estimated municipal water use has not been included in the DMS figures
reported below, nor in the projected long-term agricultural and miscellaneous use.
' The 1998 Report stated a total demand figure of 72,509 AFY (includes purveyor demand of 48,858,
DMS of 20,390, and other demand of 3,361). NL&F agriculture use (approx. 10,000 AFY) is not
included.
Santa Clarita Valley Water Supplies
Acre-
Acre -
Water Demand
Feet/Year
Feet/Year
Total Existing Demand Reported by
32,500
57,250
Purveyors
11,000
State Water Project
Development Monitoring System
47,600
Recycled
Pending Projects
9,345
Subtotal Water Supplies
Approved Projects
9,622
Firming Supplies'
Recorded Projects
3,690
TOTAL Water Supply'
Total Project Purveyor Demand (DMS)
142,800
22,660
Long Term Agricultural and Miscellaneous
7,100
Uses
TOTAL Existing and Projected Demand'
87,010
Total Existing Supply Reported by
156,900-142,800
Purveyors
Net Available Sur luslSu ly
69,890-55,790
' The 1998 Report stated a total demand figure of 72,509 AFY (includes purveyor demand of 48,858,
DMS of 20,390, and other demand of 3,361). NL&F agriculture use (approx. 10,000 AFY) is not
included.
Santa Clarita Valley Water Supplies
SupplylSouree
Wet Year
Dry Year
Alluvium
40,000
32,500
Saugus
20,000
11,000
State Water Project
95,200
47,600
Recycled
1,700
1,700
Subtotal Water Supplies
156,900
92,800
Firming Supplies'
n/a
50,000
TOTAL Water Supply'
156,900
142,800
' Firming supplies consist of 20,000 acre-feet or more from the Draught Water Bank, plus 30,000
acre-feet withdrawn from the Saugus (also assumes the dry year recharge rate of 11,000 acre-feet).
In addition, CLWA's IWRP plans for Valley residents to voluntarily conserve 10% of their normal
usage (which is not calculated in the firming figure).
' Total Water Supply estimated in the 1998 report was the same in both wet and dry years (the
pending acquisition of additional SWP entitlements were included in the total).
Some community members argue that the average annual single family residential usage
rate of 0.6 acre feet per year is too low and understates demand. Instead, these groups
contend that the figure that should be used for residential use is 1.0 acre feet per year. The
concern is that spin-off uses from residential development are not included in the
assessment of total demand. For example, the amount of water used for median
landscaping, commercial areas, schools, and retail areas are not included.
Each usage type should be computed separately to determine average connection use since
each type uses different calculations to determine demand. Dividing the total water
produced by the total connections does yield a figure of approximately 1.0 acre per year per
connection for most of the water retailers. However, this overstates average residential
usage because total connections include commercial, industrial, agricultural and residential
connection, all of which are computed differently to determine average usage. Other
regions that exhibit similar densities and usage characteristics have comparable residential
usage to the 0.6 acre feet per year figure referenced in the 1998 report. For example:
Irvine Ranch's residential figure is 0.48 acres per year per unit, and Ventura County single
home figure is 0.52 and the multi -family dwelling per unit figure is 0.42.
Staff is committed to ensuring that development is sustainable and does not create an
overdraft of the City's water resources. Reliability during a sustained draught or other
natural disaster should be planned for through the implementation of conservation
programs, reallocation of water entitlements from less affected areas to more affected areas,
maximization of water storage and storage capacity, and conjunctive use planning. The
City should take a more active role to support and encourage these activities through its
own processes and regulations.
ALTERNATIVE ACTIONS
1. Council may direct staff to report on any significant differences in data or conclusions
drawn from the information provided in the updated report.
2. Council may direct staff to hire an independent geologist to test the data as reported by
the Committee in the report and provide an evaluation of the water quality and supply
assumptions made in the report.
3. Other action as determined by Council.
FISCAL IMPACT
No City funds are directly impacted as a result of this report. However, if the Council
determines to select alternative action #2 and hire an independent geologist to test the data
reported by the Committee, supplemental funding will be necessary.
ATTACHMENTS
A. Santa Clarita Valley Water Report 1999, available in the City Clerk's reading file
SANTA CLARITA VALLEY WATER REPORT
1999
W�
W A T E R
AGENCY
Castaic Lake Water Agency
PaGELES 0
PUBLIC WORKS
6jlc Setvice'ths��o�y
Los Angeles County Waterworks District #36
NCWD
Newhall County Water District
Santa Clarita Water Company
Valencia Water Company
Prepared by: The Upper Santa Clara Valley Water Committee
February 2000
Table of Contents
Santa Clarita Valley Water Report
Calendar Year 1999
ExecutiveSummary ....................................................................................................... i
Listof Figures ... ................................................................. I .... I ............................. vii
List of Tables "'
Listof Appendices....................................................................................................... ix
I. Introduction........................................................................................................1
A. Background................................................................................................1
B. Purpose and Scope of the Report ..............................................................2
C. Description of Santa Clarita Valley Water Purveyors Service Areas .......... 3
D. Description of the Upper Santa Clara River
Hydrologic Area and Eastern Sub-Area.....................................................3
II. Water Supplies....................................................................................................5
A. Eastern, Groundwater Basin.....................................................................5
1. Alluvial Aquifer
a. General............................................................................................5
b. Historical and Current Conditions....................................................8
2. Saugus Formation
a. General..........................................................................................13
b. Historical and Current Conditions..................................................14
B. Imported Water........................................................................................16
1. Water Supply Entitlement.........................................................................17
2. Water Supply Reliability............................................................................18
3. Firming Water Supplies............................................................................19
C. Water Quality...........................................................................................23
1. Groundwater......................................................................................23
2. Imported Water...................................................................................24
D. Other Water Supplies...............................................................................24
1. Water Recycling.................................................................................24
E. Precipitation.............................................................................................25
1. Precipitation Records..........................................................................25
F. Water Resources Monitoring...................................................................25
III. Water Demands -Existing and Projected.........................................................27
A. 1999 Water Demand.....................................................................................27
B. Projected Water Demand..............................................................................27
IV. Summary of Water Supply and Demand........................................................28
A. Results for 1999............................................................................................28
B. Water Supply Outlook....................................................................................29
V. Water Conservation..........................................................................................31
A. Current Practices...........................................................................................31
VI. References........................................................................................................36
VII. Figures
VIII. Tables
IX. Appendix A
Executive Summary
Santa Clarita Valley Water Report
1999
This annual report provides factual information about the current water resources within
the Santa Clarita Valley. The report was prepared by the Upper Santa Clara Valley
Water Committee, (Committee) whose members are responsible for ensuring that
Valley residents have a safe, adequate and reliable water supply.
The Santa Clarita Valley is served by four retail water purveyors: Los Angeles County
Waterworks District 36, Newhall County Water District, Santa Clarita Water Company
and Valencia Water Company. The Castaic Lake Water Agency (CLWA) provides
imported water from California's State Water Project to the four purveyors for
distribution. These five entities meet regularly as the Upper Santa Clara Valley Water
Committee to coordinate the beneficial use of water in the Valley.
The 1999 Water Report contains additional technical information and data regarding the
local groundwater resources. The Committee retained Luhdorff & Scalmanini
Consulting Engineers to review the 1998 Water Reportrecommend technical additions
to the report and assist the Committee in preparing the 1999 Water Report. The
Committee, with assistance of the consultant, has incorporated this information into this
year's report.
In 1999, CLWA purchased an additional 41,000 acre-feet from the State Water Project,
bringing their available supply to 95,200 acre-feet. In addition, .CLWA acquired the
Santa Clarita Water Company.
This report provides information about the area's geology, the local groundwater basin,
imported water supplies, water quality, precipitation, recycled water, existing and
projected water demand and an overall outlook of water supply and demand.
The Committee reports a total water supply of approximately 156,900 to 142,800 acre-
feet per year. In 1999, the existing water demand from all purveyors was 57,250 acre-
feet and the projected total water demand reported by Los Angeles County
Development Monitoring System was 22,660 acre-feet. The projected agricultural and
miscellaneous demand is 7,100 acre-feet. In summary, existing plus projected water
demand is estimated to be approximately 87,000 acre-feet. Therefore, the Santa Clarita
Valley currently has a surplus of supply that ranges from 69,900 to 55,800 acre-feet
during varying water supply conditions over existing and near term projected demand.
The Committee projects this condition to continue for the foreseeable future given the
overall availability of local and imported water supplies, the levels of precipitation both
locally and regionally, the favorable operating condition of the groundwater basin and
the existing facilities in place to deliver water throughout the valley.
Water supplies include groundwater from the shallow Alluvial Aquifer and the underlying
deeper Saugus Formation, imported water from the State Water Project and recycled
water. The following summarizes the water resources of the Valley in 1999:
Alluvial Aquifer
• The perennial yield of the Alluvial Aquifer is 32,500 acre-feet per year. This quantity
represents the amount of water that can be pumped annually from the aquifer on a
long-term basis including fluctuations above and below the perennial yield during
wet and dry conditions without causing an undesirable result.
• On a long-term basis, there is no evidence of any historic or recent trend toward
permanent water level or storage decline. In general, throughout the alluvium,
groundwater levels have been generally higher over the last 20 years than was
consistently the case for the preceding 30 years (i.e., 1950's - 60's).
• During early development of ground water in the valley primarily for agricultural
water supply in the late 1940's through the 1960's, pumpage from the Alluvium
developed into a range above the perennial yield; and groundwater levels were
lower beneath the central part of the Valley as a result when compared to today's
levels. With the decline in agricultural water use since about 1960, and with the
development and importation of supplemental surface water supplies from the State
Water Project, there has been a widespread recovery f Alluvial groundwater levels
to long-term largely constant high conditions for about 30 years.
• Historic operating results indicate the aquifer is in good operating condition and can
support pumpage above the annual perennial yield of 32,500 acre-feet for one or
more years without adverse results, e.g., long-term water level decline or
degradation of groundwater quality.
Saugus Formation
• The Saugus Formation has a large estimated storage capacity of 1.4 million acre-
feet of usable groundwater. A determination of the annual perennial yield has not
been made because information from active wells pumping from the Formation is
limited. However, for long term planning purposes, an annual recharge potential of
20,000 acre-feet per year has been established for the Formation.
ii
• Pumpage from the Saugus Formation has only been about 7,400 acre-feet per year,
on average, since 1980; detailed records are missing prior to 1980, but historical
pumpage from the Saugus was quite small prior to 1960 (100 - 200 acre-feet per
year) and was still small in the 1960's (peak pumpage of about 3,000 acre-feet per
year through the mid - 1960's).
• As a result of long-term relatively low pumpage from the Saugus Formation,
groundwater levels in that aquifer have remained essentially constant over the last
35 to 40 years.
• The Saugus Formation is a very important part of the overall strategy to "drought
proof" water supplies in the Santa Clarita Valley. The Saugus Formation is capaBle
of producing on the order of 40,000 acre-feet per year for short-term periods. This
increased level of pumping would logically be limited to dry years, presumably when
short term reductions in imported water supplies could occur.
Imported Water
• CLWA has an entitlement to 95,200 acre-feet per year of imported water from the
State Water Project. CLWA operates two water filtration plants where the water is
disinfected, treated and filtered prior to being delivered to purveyors for distribution.
• Imported water deliveries are subject to reduction when statewide droughts occur.
CLWA has completed an Integrated Water Resources Plan (IWRP) that addresses
programs for enhancing water supply reliability during such occurrences. A $500
million capital improvement program funded by Castaic Lake Water Agency has
been established to provide facilities and additional water supplies needed to firm -up
imported water during times of drought.
• Examples of projects currently being funded include demand side management
programs (conservation), purchase of additional SWP supplies, grown water storage
programs both inside and outside the Santa Clarita Valley, and participation in the
state's Drought Water Bank and shott.ie[mwater exchanges from other agencies on
an as needed asis. These measures, implementedover time, provide assurance
that alternate supplies will be available to meet local water demands when SWP
deliveries are reduced.
• In 1999, CLWA increased their imported water supply by acquiring 41,000 acre-feet
of additional entitlement from willing sellers in Kern County. This additional
entitlement is needed to meet water demands from proposed annexations and
developments planned within CLWA's service area.
IN
Water Demands
In 1999, the total water demand reported by the four retail water purveyors is 57,250
acre-feet.
Los Angeles County Regional Planning Department maintains water demand
projections for all pending, approved and recorded projects for which land divisions
have been filed within the study area of this report. Known as the Development
Monitoring System (DMS), it reports that the projected water demand from all projects
being tracked is 22,600 acre-feet per year.
Total existing plus projected water demand as measured under the DMS system is
79,850 acre-feet per year.
• Agricultural and miscellaneous water demands are estimated to be 7,100 acre-feet per
year.
Reliability Goal
There are many on-going efforts to produce an adequate and reliable supply of good
quality water for valley residents. Water consumers expect that their needs are going to
be met with a high degree of reliability and quality of service. To that end, the
Committee, through CLWA's IWRP has established a water _reliabil�it � for planning
purposes sufficient to meet projected demands 95 petCg—t- n othe time or in 19 of 20
years. In the remaining 5 percent of the time, it is assumed that the maximum allowable
supply shortage will be 10 percent of demands.
• This level was chosen because a 10 percent water demand reduction is feasible during
a drought based on past experience. When a shortage occurs, water consumers
typically increase their awareness of water usage and voluntarily reduce water
demands. During the last drought of the early 1990's, voluntary conservation efforts by(/
area residents resulted in a decrease in water demand of about 20 percent per year. ((��
• It should be noted that for planning purposes, water supplies and facilities are added on
an incremental basis and ahead of need. It would be economically imprudent now, or in
the short term, to acquire all the facilities and water supplies needed for the next twenty
to thirty years. This would represent an unfair shift of costs from future customers to
existing customers.
iv
Y
Summary of Water Supply and Demand
• For planning purposes, a summary of the Valley's water resources is presented below:
1. Current water supply ranges from 156,900 to 142,800 acre-feet per year.
2. Existing retail water demand is 57,250 acre-feet.
3. Projected water demand estimated by Los Angeles County Development Monitoring
System is 22,660 acre-feet per year.
4. Projected water demand from agricultural and miscellaneous uses is 7,100 acre-feet
per year.
5. Total projected water demand over the next ten or so years is estimated to be
87,000 acre-feet.
6. The Santa Clarita Valley currently has a surplus of supply that ranges from 69,900 to
55,800 acre-feet during varying water supply conditions over existing and near term
projected water demand.
FIGURES
Figures
1-1 Purveyor Water Service Areas
1-2 Upper Santa Clara River Basin
11-1 Groundwater Basins within Eastern HAS
II -2 Groundwater Production
Santa Clarita Valley Alluvial Aquifer
II -3 Hydrograph of Groundwater Levels
II -4 Hydrograph of Groundwater Elevation
Well 4N/16W-24133
II -5 Hydrograph of Groundwater Elevation
Well 4N/16W-21 R1
II -6 Hydrograph of Groundwater Elevation
Well 4N/16W-4H1
II -7 Hydrograph of Groundwater Elevation
Well 4N/17W-12C1
II -8 Hydrograph of Groundwater Quality
Well 4N/15W-18N2
II -9 Hydrograph of Groundwater Quality
Well 4N/16W-14E2
II -10 Hydrograph of Groundwater Quality
Well 4N/17W-22E2
11-11 Hydrograph of Groundwater Quality
Well 4N/15W-6P2
II -12 Groundwater Production
Santa Clarita Valley Saugus Aquifer
II -13 Hydrograph of Groundwater Elevation
Well 4N/16W-22M1
Vi
4 -
II -14 Hydrograph of Groundwater Quality
Well 4N/16W-22M 1
II -15 Santa Clarita Valley Precipitation
Newhall County Water District Gage
II -16 Santa Clarita Valley Precipitation
Saugus Powerplant Gage
II -17 Cumulative Departure from Mean Precipitation
Newhall County Water District Gage
IV -1 Santa Clarita Valley Water Supplies
vi,
TABLES
Tables
II -1 Newhall County Water District
1999 Groundwater Quality
11-2 Santa Clarita Water Company
1999 Groundwater Quality
II -3 Valencia Water Company
1999 Groundwater Quality
II -4 Castaic Lake Water Agency
1999 Imported Water Quality
III -1 Water Production, Los Angeles County
Waterworks District 36
III -2 Water Production
Newhall County Water District
III -3 Water Production
Santa Clarita Water Company
III -4 Water Production
Valencia Water Company
HI -5 Total Water Production
Water Purveyors
III -6 Water Production
Agriculture and Miscellaneous Uses
111-7 Existing and Projected Water Demand
IV -1 Water Supply/Demand Outlook
viii
APPENDICES
Appendix A
1. Upper Santa Clarita Valley Water Committee Letter to Los Angeles County
Supervisor Antonovich and City of Santa Clarita Mayor Jan Heidt, dated November
4, 1998.
2. City of Santa Clarita Letter to the Upper Santa Clara Valley Water Committee dated
December 10, 1998.
ix
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Section LA
Section I
Introduction
Background
For most residents of the Santa Clarita Valley (Valley), domestic water service is
provided by four retail water purveyors. They are Los Angeles County
Waterworks District 36, Newhall County Water District, Santa Clarita Water
Company, and Valencia Water Company. The Castaic Lake Water Agency
(CLWA) is a wholesaler that obtains water from California's State Water Project.
CLWA draws water from Castaic Lake where it is filtered and disinfected at two
treatment plants before distribution to the purveyors. These five entities meet
regularly as the Upper Santa Clara Valley Water Committee (Committee) to
coordinate the beneficial use of water in the Valley. Their respective service
areas are shown in Figure 1-1.
The Committee was officially formed in 1967 when its members requested the
United States Geological Survey (USGS) to prepare a joint water resources
study of the Santa Clara River Watershed. The purpose of the Committee was to
consult with the USGS regarding the study, to assist with the accumulation of
data, and to continue working toward coordinating water management programs
for the area. The study was completed in 1972 by S. G. Robson of the USGS
and provides the initial baseline information of the valley's groundwater
resources.
Over the years, the Committee has continued to review and document the
availability of water resources in the region. Past studies have assessed the
condition of the local groundwater aquifers, their hydro -geologic character,
aquifer storage capacity, perennial yield and recharge rate and the potential for
conjunctive use of both groundwater and imported water resources.
Other efforts have included developing drought contingency plans, evaluating the
impact of landfills on the groundwater basin, coordinating emergency response
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procedures and implementing valley wide conservation programs. In 1985, the
Committee prepared the area's first Urban Water Management Plan in
conformance with the guidelines and requirements of AB797. Information in the
plan as well as updates to the initial plan have been coordinated among the retail
purveyors and CLWA so that water supply and demand information is in general
agreement for long term planning purposes. In 1998, the Committee
participated with CLWA in preparation of an Integrated Water Resources Plan
(IWRP). The IWRP represents the most comprehensive analysis to date of
existing and future water resources within CLWA's service area and was a
helpful resource document in preparation of this report.
Section 1.13 Purpose and Scope of the Report
The purpose of this report is to provide factual information about the current
water resources within the Santa Clarita Valley. This report has been prepared
by the Upper Santa Clara Valley Water Committee as reported in a letter dated
November 4, 1998 to Los Angeles County Supervisor Michael D. Antonovitch
and City of Santa Clarita Mayor Jan Heidt. A copy of the letter is provided in
Appendix A.
The report establishes a format for providing information regarding the availability
of water on an annual basis. It is intended to be a helpful resource for use by
water planners and local planning agencies responsible for coordinating and
planning water supplies and facilities required to keep pace with planned
development while maintaining adequate and reliable supplies for existing
residents.
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Section LC Description of Santa Clarita Valley Water Purveyor
Service Areas
Los Angeles County Waterworks District 36 service area encompasses
approximately 7,635 acres in the Hasley Canyon area and the unincorporated
community of Val Verde. The District serves approximately 774 customers and
obtains its full water supply from Castaic Lake Water Agency.
Newhall County Water District service areas lie in three distinct geographical
areas of the Santa Clarita Valley — Newhall, Pinetree, and Castaic. NCWD has
approximately 6,758 service connections, which are spread over a 34 square
mile area. NCWD supplies water from both groundwater wells and Agency
turnouts.
Santa Clarita Water Company's service area includes the City of Santa Clarita
and unincorporated portions of Los Angeles County in the communities of
Saugus, Canyon Country, and Newhall. SCWD supplies water from both
groundwater wells and Agency turnouts to an estimated 22,000 service
connections.
Valencia Water Company's service area serves a portion of the City of Santa
Clarita and unincorporated communities of Castaic, Newhall, Saugus, Stevenson
Ranch, and Valencia. The service area is approximately 25 square miles located
roughly 35 miles northwest of downtown Los Angeles. VWC supplies water from
both groundwater wells and Agency turnouts to an estimated 22,000 service
connections.
Section LD Description of the Upper Santa Clara River Hydrologic Area
and Eastern Sub -Area
The Upper Santa Clara River Hydrologic Area (HA), as defined by the California
Department of Water Resources (DWR), is located almost entirely in
northwestern Los Angeles County. (Figure 1-2) The area encompasses about
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654 square miles comprised of flat valley land (about 6 percent of the total area)
and hills and mountains (about 94 percent of the total area) that border the valley
area. The mountains include the Santa Susana and San Gabriel Mountains to
the south and the Sierra Pelona and Leibre-Sawmill Mountains to the north.
Elevations range from about 800 feet on the valley floor to about 6,500 feet in the
San Gabriel Mountains. The headwaters of the Santa Clara River are at an
elevation of about 3,200 feet at the divide separating this hydrologic area from
the Mojave Desert.
The Santa Clara River and its tributaries flow intermittently westward about 35
miles to Blue Cut, just west of the Los Angeles—Ventura County line, where it
forms the outlet for the Upper Santa Clara River HA. The principal tributaries of
the upper river are Castaic Creek, San Francisquito Creek, Bouquet Creek, and
the South Fork of the Santa Clara River. The prominent valley floor and
hydrologic characteristics of the local aquifers define the groundwater basin and
location of wells used by the retail purveyors.
The Eastern Sub -Area covers about 70 percent of the hydrologic area. The
Santa Clara River traverses the Sub -Area near its southern boundary. The
mountainous area to the north of the river is dissected by long southwest draining
canyons — Bouquet, Mint, and San Francisquito Canyons. Castaic Lake and
Lagoon are within this Sub -Area. The South Fork of the Santa Clara River,
draining the mountains along the southern boundary, traverses the valley floor
where it joins with the main stem of the Santa Clara River.
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Section II
Water Supplies
Historically, local groundwater extracted from the Alluvial and Saugus Aquifers
has been the primary source of water in the Santa Clarita Valley. However, local
groundwater supplies since 1980 have been supplemented with imported water
from the State Water Project. This Section describes the geologic setting of the
Santa Clarita Valley, the local and imported water supplies, water quality,
precipitation records and recycled water programs.
Section ILA Eastern Groundwater Basin
Figure II -1 shows the approximate boundaries of the Eastern Groundwater
Basin, which is the largest and most developed groundwater body of the Upper
Santa Clara River HA. It is an alluvial -valley aquifer -stream system. The basin
consists of Holocene Alluvium, Pleistocene terrace deposits, and the Plio-
Pleistocene Saugus Formation.
Information on the hydrologic conditions of the groundwater basin comes from
three previous studies. Robson (1972) evaluated the availability, quantity, and
potential for development of the groundwater resources of the Saugus -Newhall
area. Slade (1986) conducted an evaluation of the hydrologic conditions of the
Alluvial Aquifer underlying the Santa Clarita Valley and its potential for artificial
recharge. In 1988, Slade conducted a hydrologic evaluation of the Saugus
Formation, its quantity, and potential for development.
Section II.A.1.a. Alluvial Aquifer - General
The Holocene Alluvium exists extensively on the valley floor and becomes
restricted at the narrow channels of the river's tributaries in the upper reaches.
The Alluvium is deepest along the center of the present river channel, with a
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maximum of about 200 feet near the area known as Saugus. It thins toward the
flanks of the adjoining hills and the eastern and western boundaries of the basin
and, in the tributaries, becomes a veneer in their upper reaches. The Alluvium is
productive where saturated and most of the wells operated by the purveyors are
located along the main river valley and its tributaries. Groundwater in the
Alluvium is unconfined.
Groundwater levels in the Alluvium have varied over the period of available
record (generally since the 1950's, with some data extending back to 1930),
reflecting historical changes in pumping, as well as seasonal and longer term
variations in the amount of recharge and discharge. Because of the generally
high permeability of the Alluvium and the hydraulic interrelationship between the
aquifer and the Santa Clara River and its tributaries, groundwater levels and
quality fluctuate rapidly and, to a large degree, in response to precipitation and
runoff. From about Castaic Junction to Blue Cut, the Alluvium thins and narrows.
This configuration forces groundwater to rise, keeping the depth to water at or
close to land surface.
Groundwater generally moves toward the outlet of the Sub -Area, which is also
the outlet of the Upper Santa Clara River HA. Thus, groundwater movement in
the Alluvium beneath of the tributaries is toward their confluence with the Santa
Clara River and then westward in the Alluvium beneath the Santa Clara River.
As discussed in more detail below, this general pattern of groundwater flow
direction remains unchanged whether groundwater levels are high or
intermittently depressed. The San Gabriel fault and Holser fault traverse the
Sub -Area. The San Gabriel fault has been reported to be a partial barrier to
groundwater flow in the Alluvium near Bouquet Junction, where groundwater
levels are offset. The Holser fault does not appear to affect groundwater levels
and is not a definitive barrier to groundwater flow.
The Alluvium is the most permeable of the local aquifer units. Based on well
yields and aquifer testing, estimated transmissivity values of 50,000 to 500,000
gallons per day per foot have been reported for the Alluvium, with the higher
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values where the alluvium is thickest in the center of the valley and generally
west of Bouquet Canyon.
The amount of groundwater in storage in the Alluvium can vary considerably
because of the effects of recharge and discharge from the aquifer. Based on an
Alluvial area of 16,410 acres, variable thickness, and specific yield of 9 to 16
percent, it has been estimated that the theoretical maximum amount of
groundwater that could be held and retrieved in usable storage is 240,000 acre-
feet. Based on historical fluctuations in groundwater levels, calculated volumes
of groundwater in storage in the Alluvium have ranged from a high of 201,000
acre-feet in April 1945 to a low of 107,000 acre-feet in November 1965.
Three of the four water companies pump local groundwater in addition to
purchasing imported water from CLWA. The Los Angeles County Waterworks
District 36 presently has no operating groundwater extraction facilities. Also, the
County of Los Angeles and the Newhall Land and Farming Company pump from
the Alluvial Aquifer to service their own lands.
In 1986, the Committee hired Richard C. Slade and Associates to study the
Alluvial Aquifer and determine, among other things, the aquifer's hydrogeologic
condition, perennial yield, storage capacity and potential for artificial recharge.
Based on historical pumpage and hydrologic conditions over a 28 year base
period (1957-58 through 1984-85), Slade estimated that the annual perennial
yield for the Alluvial Aquifer is 31,600 acre -ft to 32,600 acre -ft per year (one acre -
ft is +/- 325,900 gallons). Based on the results of that hydrogeologic report and
the operating experience of its members, the Committee has adopted a perennial
yield of 32,500 acre -ft per year. This quantity represents the amount of water that
can be pumped annually from the aquifer on a long-term basis, including
fluctuations above and below the perennial yield amount during wet and dry year
conditions, without causing an undesirable result. Undesirable results could
include long-term groundwater level decline (and associated decline in
groundwater storage), degradation of water quality in the aquifer, or land
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subsidence. As discussed below, none of these conditions has been detectable
over the period of available record. (about 50 years).
The current management practice of the Committee is to maximize use of the
Alluvial Aquifer because of the aquifer's ability to store and produce good quality
water on an annual basis. As with many groundwater basins, it is possible to
intermittently stress the Alluvial aquifer, i.e., pump in excess of the perennial yield
value for one or more years without long-term adverse effects. Short-term
Pumpage above perennial yield may temporarily lower groundwater levels, as
has been the case in the Alluvium several times since the 1930's; however,
subsequent decreases in pumpage and normal to wet period recharge result in a
return of groundwater levels and associated refilling of groundwater storage.
Historical groundwater data collected from the Alluvial Aquifer over many
hydrologic cycles provides assurance that groundwater elevations return to
normal in average or wet years -following periods of abnormally low rainfall.
Long term adverse impacts to the Alluvial Aquifer can occur if the amount of
water extracted from the aquifer exceeds the amount of water that recharges the
aquifer over a period of many years. However, the Committee routinely monitors
the quantity and quality of water extracted from the aquifer and has identified
cooperative measures, if needed, to ensure continued use of the aquifer. Such
measures can include but are not limited to artificial recharge of the aquifer with
surface water supplies, financial incentives discouraging extractions above a
preset limit and use of other alternative supplies such as imported water or
reclaimed water when available.
Section II.A.1.b. Alluvial Aquifer Historical and Current Conditions
As introduced above, the 1986 hydrogeologic report on the Alluvium extensively
discussed perennial yield of that aquifer and concluded that, for a 28 year base
period (1957-58 through 1984-85), the perennial yield was in the range of 31,600
to 32,600 acre-feet per year (afy). Part of that determination included accounting
IF
for the fact that groundwater storage had increased by an average, of
approximately 600 afy over the base period.
Over the last two decades (1980-98), total pumpage from the Alluvium has
ranged from a low of about 20,000 afy (in 1983) to as high as nearly 40,000 afy
(in 1997); average pumpage from the Alluvium over that period has been 28,500
afy. Of that pumpage, more than half, on average, has been for municipal water
supply (about 18,000 afy), and the balance (about 10,500 afy, on average) has
been for agricultural and some other (minor) uses.
Historical pumping records prior to 1980 show a significant increase in
agricultural pumpage, all from the Alluvium, from the mid -1940's through about
1960, followed by a nearly linear decline in agricultural pumpage through the late
1970's (Figure II -2). Agricultural pumpage throughout the 1950's was
consistently in the range of about 33,000 to 41,000 afy. During that same time,
municipal pumpage appears to have been quite small, less than 4,000 afy. As
agricultural pumpage declined in the 1960's and 70's, there was a concurrent but
smaller increase in municipal pumpage, from slightly less than 5,000 afy in 1960
to nearly 11,000 afy in 1966. Municipal pumping records are incomplete
between 1966 and 1980, but the overall record suggests an average annual
increase on the order of 400 of through that time period.
Groundwater level data in various parts of the basin illustrate basin response to
the historical pumpage from the Alluvium. Organized into hydrograph form
(depth to ground water or groundwater elevation vs. time), historical groundwater
levels were lower in the 1950's and 60's than current levels in the middle to
western part of the basin, logically in response to the higher pumpage of the
1950's. Groundwater levels in those areas notably recovered as pumpage
declined through the 1960's and 70's. They have subsequently sustained
generally high levels for much of the last 30 years with two dry -period exceptions:
Mid -1970's and late 1980's - early 1990's; recovery to previous high groundwater
levels has followed both of those short dry -period declines. On a long-term
basis, there is no evidence of any historic or recent trend toward permanent
IN
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water level or storage decline. In general, throughout the alluvium, groundwater
levels have been generally higher over the last 20 years than was consistently
the case for the preceding 30 years (1950's - 60's).
During the last 20 to 30 years, in essentially all the alluvial portions of the basin,
groundwater levels have fluctuated from near the ground surface when the basin
is full, to as much as 100 feet lower when the basin is stressed (pumped) during
intermittent periods of reduced recharge. Selected hydrographs of groundwater
elevations throughout the basin illustrate the above described conditions.
Figures II -3 — 11-5 are illustrative of groundwater conditions along the main
channel of the Santa Clara River, from east (near the mouth of Sand Canyon,
Figure II -3), to the area between Mint Canyon and Bouquet Canyon (Figure II -
4), to farther west (immediately below the mouth of Bouquet Canyon, Figure 11-
5). Similar long-term conditions are evident in the tributary canyons; see, for
example, Figure II -6 in San Francisquito Canyon and Figure II -7 in lower
Castaic Valley.
Depending on the period of available data, all the hydrographs show the same
general picture: recent (last 20 years) groundwater levels are generally higher
than over the preceding 30 years; in some locations, there are intermittent dry -
period declines (and an associated use of some ground water from storage)
followed by wet -period recoveries (and associated refilling of storage space). On
a long-term basis, whether over the last 20 years when average pumpage was
slightly less than the 1986 estimate of perennial yield, or over the last 40 to 50
years (since.the 1950's - 60's), the Alluvium shows no signs of water level -related
overdraft, i.e., no trend toward decreasing water levels and storage. On those
bases, pumpage from the Alluvium has been and continues to be within the
perennial yield of that aquifer.
As a complement to the preceding discussion of groundwater levels, a water
supply report, prepared for Newhall Land and Farming Company in 1948,
includes hydrographs for several wells that show water level records from about
1930 to 1947. Although those data have not been maintained in the "modern"
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record of available groundwater level data, the hydrographs clearly show another
earlier incidence of the same wet -dry cycle fluctuations in groundwater levels: 50
to 80 feet of decline during the dry period of the 1930's followed by recovery of
groundwater levels to near the ground surface beginning in the late 1930's and
continuing through the 1940's. There are five wells in the 1948 report where
some "modern" (i.e., since 1957) water level records have been maintained, at
least through 1978. Connection of the two periods of available water level data
at all five wells shows historical repeats of groundwater level fluctuations of the
same magnitude as those which have subsequently occurred in the same wells.
Historical groundwater level data are sufficiently detailed in the Alluvium to allow
analysis and interpretation of groundwater flow within and, to a limited extent, out
of the basin. In general, groundwater flow in the Alluvium is in an overall
westerly direction, toward Ventura County, with "tributary" groundwater inflow
from beneath the tributary canyons north and south of the main Santa Clara
River. The historical fluctuations in groundwater levels, as described above,
have caused minor changes in groundwater gradients within the basin but,
overall, the direction of groundwater flow has not charged from wet to dry periods
(high or low groundwater levels).
Of related interest is groundwater flow out of the basin at its west end. No
detailed analysis of subsurface outflow has been undertaken. However, for
general purposes, examination of aquifer extent and historical groundwater levels
suggests that potential groundwater outflow has remained unchanged for the
period of available data (approximately 40 years). While the nearby down
gradient Piru groundwater basin has been mapped and described as not
extending to the westerly limit of the Alluvium beneath the Upper Santa Clara
River (United WCD, 1999), groundwater levels at the westerly end of the
Alluvium have remained nearby constant since the 1950's, independent of the
fluctuations in other parts of the Alluvium (in the central to easterly part of the
Santa Clarita Valley) as described above. As a result, while there has been no
quantification of subsurface outflow and/or the amount of groundwater
discharging to the River (and thus contributing to stream flow down the Santa
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Section II.A.2.a. Saugus Formation - General
Late Pleistocene older Alluvium, known as terrace deposits, are elevated along
the Santa Clara River to form terraces and mesas. These terrace deposits
define the Saugus Formation in the Eastern Groundwater Basin. Because they
are elevated, they usually lie above the regional water table and act as areas of
infiltration and percolation to the underlying formation.
The Saugus Formation is a very important component of the groundwater basin.
The Formation is exposed over an extensive area (Approximately 85 square
miles) and underlies much of the Alluvial Aquifer. Although maximum thickness
of the formation is reported to be 8,500 feet, the estimated fresh water -bearing
thickness of the formation ranges from 5,500 feet between the San Gabriel and
Holser faults to 1,500 feet north of the San Gabriel fault.
Groundwater in the Saugus Formation is considered confined. High piezometric
levels in tested Saugus wells and low aquifer storativity values (coefficient of
storage) recorded from Saugus Formation wells are typical of confined
conditions.
The Saugus Formation transmissivity values range from 80,000 to 160,000
gallons per day per foot, with the higher values in the upper portions of the
formation. The amount of water in storage in the Saugus Formation is
substantial. Slade estimated that the amount of usable groundwater in storage is
1.4 million acre-feet, which is about seven times more than the usable storage in
the Alluvial Aquifer.
A determination of the perennial yield of the Saugus has not been made because
information on the characteristics of the aquifer is limited. Until additional wells
are drilled and water pumped from the Formation, a definitive determination of
the annual perennial yield cannot be made. However, the 1988 assessment of
the Saugus Formation includes a preliminary estimate of the potential annual
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A
recharge to be between 11,000 and 22,000 acre-feet per year. Principal
recharge sources to the Saugus Formation are direct precipitation on exposed
Saugus Formation deposits and direct infiltration from the overlying saturated
Alluvial Aquifer. For long term planning purposes, the Committee has adopted
an annual recharge potential of 20,000 acre-feet for the Saugus Formation.
Since the 1988 estimate of potential recharge was based, in part, on the water
levels in the overlying Alluvium, and in light of the predominately higher Alluvial
water levels over the last 30 years, a planning estimate in the upper part of the
estimated recharge range is considered appropriate.
As stated above, the Saugus Formation has a large estimated storage capacity
of 1.4 million acre-feet of usable groundwater in the depth range from 500 to
2,500 feet (for reference, the static water level is generally on the order of 100
feet, well above the depth interval used to estimate usable storage). It is
believed that the aquifer is capable of producing on the order of 40,000 acre-feet
for one or more dry years, presumably when shortages to CLWA's imported
water supplies would occur. Such high pumping would be followed by periods of
lowered pumpage in order to allow recharge to recover water levels and storage
in the Saugus. Maintaining the substantial volume of water in the Saugus
Formation is an important strategy to help "drought proof' water supplies in the
Santa Clarita Valley.
Section II.A.2.b. Saugus Formation - Historical and Current Conditions
As introduced above, there has been no estimate or other quantification of
perennial yield of the Saugus Formation beneath the Santa Clarita Valley. The
1988 hydrogeologic report on the Saugus Formation (Slade, 1988) estimated that
the potential recharge to the Saugus Formation was a combination of a fraction
(10 to 15 percent) of incident precipitation on outcrop portions of the Saugus and
thinly veneered terrace deposits over the Saugus, plus deep percolation of
ground water from the saturated portions of the Alluvium that overlie the Saugus
beneath the Santa Clara River. Since the latter recharge component is directly
affected by the significant groundwater level fluctuations in the overlying Alluvium
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as described above, the estimated recharge potential was reported as a range:
about 11,000 to 13,000 afy under dry (depressed alluvial groundwater levels)
conditions, and about 20,000 to 22,000 afy under wet (high alluvial groundwater
levels) conditions. These ranges were presented as a preliminary estimate of the
maximum recharge to the Saugus Formation, and were noted to not be
construed as a rigorous determination of its perennial yield. Subsequent to the
1988 hydrogeologic report on the Saugus Formation, short-term yield from the
Saugus has been estimated to be up to 40,000 afy to supplement other water
supplies during a significant dry period (Slade, 1997 as referenced in the CLWA
Integrated Water Resources Plan, 1998).. Such a short-term pumping capacity
from the Saugus would likely need to be balanced, over a longer time period,
with smaller pumping in other years (such as has historically been the case, as
discussed below) to maintain average production within perennial yield.
Historical pumping records prior to 1980 are limited, but suggest that pumpage
from the Saugus was minimal at that time (Figure II -12). The records indicate
that there was essentially no pumping from the Saugus prior to 1960 (on the`
order of about 100 of in most years, beginning in 1948), and that some increased
pumping for agricultural water supply began in about 1962 (about 900af). The
largest amount of agricultural pumping from the Saugus was during the mid -
1960's, when annual pumpage was about 3,000 af. Agricultural pumping from
the Saugus declined to near zero by the late 1980's, but has been generally in
the 500 to 1,000 afy range since 1982. Municipal pumping records from the
Saugus are incomplete prior to 1980. There was no Saugus pumpage for
municipal supply in the early 1960's; despite the lack of pre -1980 records, post -
1980 data suggests that municipal pumping from the Saugus began in the
1970's, and reached nearly 5,000 afy by 1980-81.
Since 1980 (through 1998), total pumpage from the Saugus Formation has
ranged from a low of about 3,850 afy (in 1983) to a high of nearly 15,000 afy (in
1991); average pumpage over that period has been nearly 7,400 afy. The great
majority of pumpage from the Saugus is for municipal supply (over 6,800 afy, or
93 percent, on average).
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Unlike the Alluvium, there are limited Saugus water level data; however, the
limited data indicate that, although there have been seasonal water level
changes in response to pumpage, the long-term trend in the Saugus (over the
last 35 to 40 years) has been one of relative groundwater level stability (see, for
example, Figure II -13). There is no trend toward a sustained decline in Saugus
water levels or storage that would be indicative of overdraft. On that basis, and
with recognition that historical (pre -1980) pumpage was quite small, and that
average pumpage over the last two decades has been less than the reported
range of potential recharge to the Saugus, pumpage from the Saugus has been
and continues to be within the perennial yield of that aquifer.
As with the Alluvium discussed above, groundwater quality in the Saugus
Formation is a key factor in assessing that aquifer as a municipal as well as
agricultural water supply. Long-term Saugus groundwater quality data are not
sufficiently extensive (few wells) to permit any sort of basin -wide analysis or
assessment of pumping -related impacts on quality. Based on the most complete
historical record, over the last 35 years, however, groundwater quality in the
Saugus has remained generally constant, and there is no evidence of
groundwater quality degradation that might be interpreted as indicative of
overdraft or other concern relative to the long-term viability of the Saugus as an
agricultural or municipal water supply (Figure II -14).
Section 11.6 Imported Water
CLWA obtains imported water supplies from the State Water Project (SWP)
which is managed by the Department of Water Resources (DWR). CLWA is one
of 29 agencies holding long-term contracts with the State of California for SWP
water. SWP water originates from rainfall and snowmelt in northern and central
California. Runoff is stored in Lake Oroville, which is the project's largest storage
facility. The water is then released down the Feather River to the Sacramento
River and the Sacramento -San Joaquin Delta. Water is diverted from the Delta
into the Cliffton Court Forebay, and then pumped into the 444 -mile long
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a Aqueduct. SWP water is temporarily stored in San Luis Reservoir,
jointly operated by the DWR and the U.S. Bureau of Reclamation. Prior
,ry to Castaic Lake Water Agency, SWP supplies are stored in Castaic
ated at the end of the West Branch of the California Aqueduct.
Y ,
C�WA's service area covers approximately 195 square miles (124,800 acres)
includIng the entire City of Santa Clarita and the surrounding unincorporated
communities. CLWA obtains State Water from the upper reservoir at Castaic
Lake.:The water is treated, filtered and disinfected at CLWA's Earl Schmidt and
Rio Vista Water Treatment Plants. CLWA has a current capacity to treat 55
million gallons per day. From the plants, treated water is delivered by gravity to
each of the four purveyors through a distribution network of pipelines and
turnouts. At the present time, CLWA delivers water to the four purveyors through
11 turnouts. A summary of SWP deliveries to each purveyor for 1999 is reported
In Section III of this report.
Section H.6.1 Water Supply Entitlement
There are 29 agencies in California that contract for water from the State Water
Project. Administered by DWR, each agency has a specified amount of
entitlement for water that currently totals approximately 4.2 million acre -ft per
Year. The term of the contract is through the year 2035 and is renewable after
that year.
CLWA has a contractual entitlement to purchase 95,200 acre-ft/year of water
from SWP. The original contract for 23,000 acre-ft/year was signed in 1960 and
the entitlement was later increased to 41,500 acre/ft-yr. CLWA increased its
entitlement to 54,200 acre-ft/year by purchasing the 12,700 acre-ft/year
entitlement of the Devil's Den Water District in 1988. The recent acquisition of
41,000 AF in 1999 from water agencies in Kern County increased CLWA's
entitlement to its present level of 95,200 acre-feet/year.
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Section II.13.2 Water Supply Reliability
California is subject to a wide range of hydrologic conditions and water supply
variability. As discussed above, CLWA has existing contract entitlement to
95,200 acre -ft per year of SWP water. The SWP is not complete and supplies
are subject to reduction when state-wide droughts occur. As a result, CLWA and
the local retail purveyors have worked together to plan and develop operational
strategies to augment the Valley's water supply when imported water is reduced.
A discussion of alternate or "firming water" supplies is described later in this
section of the report.
Key factors, which have the potential to improve the reliability of imported water,
are the Monterey Agreement (SWP contract amendment), the CALFED Bay
Delta Program, DWR's conjunctive use programs, and local programs designed
to augment supplies during prolonged shortages. When rainfall and snowmelt
provide an adequate amount of water, CLWA can obtain water from SWP up to
their full entitlement. However, during dry years, there will not be enough water
to provide CLWA and other SWP contractors with their full water delivery
requests.
The 1987-91 drought led to negotiation of the Monterey Agreement in 1994. The
Monterey Agreement was developed to allocate water among the SWP
contractors during times of water shortage and resolve other problems with the
SWP contract. Signing of this agreement improves CLWA's imported water
reliability during droughts by eliminating the shortage provisions on agricultural
entitlement and providing greater flexibility to obtain additional SWP water when
needed.
The CALFED Bay -Delta Program is a cooperative State -Federal process with the
goal of developing a long-term solution for the many competing water needs of
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the Sacramento -San Joaquin Delta. This program is a three — phased effort
addressing a number of issues including ecosystem quality, water quality, water
supply reliability and system vulnerability. On December 18, 1998, Governor
Pete Wilson announced the release of the draft revised CALFED Phase II
Report. The document provides a framework for restoring ecological health to
the Bay -Delta, providing a reliable water supply for all uses and improving water
quality in California. The next step is approval of the draft programmatic
environmental impact statement/environmental impact report in 2000.
Implementation of the CALFED improvements over time will significantly improve
CLWA's ability to maintain delivery of high quality water and provide much
needed certainty of supply during dry years.
Section II.13.3 Firming Water Supplies
Reliability of CLWA's SWP supply does not wholly depend on the "Delta -Fix" and
other water supply facilities recommended by the CALFED Program. CLWA can
pursue its own water supply firming program by planning for and funding their
own programs. As an example, CLWA's long term capital improvement program
is currently funding the purchase of additional SWP supplies, groundwater
storage programs both inside and outside the Santa Clarita Valley, the state's
Drought Water Bank, and short term exchanges from other agencies on an as -
needed basis. It is believed that these measures implemented over time provide
CLWA assurance that alternate supplies will be available to meet local water
demands when SWP deliveries are reduced during times of drought.
Firming water supplies are defined as alternate short term supplies (1 to 3 years)
made available to the local purveyors to be used when imported water is reduced
during drought conditions. The Committee has identified three current firming
supply options to be included in this report. They are: 1) acquiring additional
SWP entitlement, 2) the Drought Water Bank, operated by the State of California,
and 3) local supply augmentation.
In 1999, CLWA acquired 41,000 acre-feet of SWP Table A Entitlement (via a
-19
permanent transfer) from Kern County Water Agency and its member unit the
Wheeler Ridge-Maricopa Water Storage District. This transfer was completed
under the terms of the Monterey Agreement, in which agricultural SWP
Contractors agreed, on a willing seller willing buyer basis, to make available
130,000 acre-feet of entitlement for permanent transfer to urban SWP
Contractors. By this permanent transfer, CLWA SWP Table A Entitlement has
increased to 95,200 acre-feet per year. In CLWA's IWRP, additional imported
water was identified as one component of an overall plan to increase the
reliability and availability of water within its service area. For the foreseeable
future, this transfer increases their total supply while providing a significant
"drought buffer" even in times of shortage.
The State Drought Water Bank is implemented as needed by an executive order
of the Governor or a finding by DWR's Director that water deliveries will be
curtailed. The purpose of the Bank is to help California's urban, agricultural and
environmental interests meet their water supply needs during water short years.'
This procedure was used successfully in 1991, 1992 and 1994 when DWR
purchased water from willing sellers and sold the water to willing buyers under a
set of allocation guidelines. Although CLWA's allocation of imported water was
reduced in 1991, it did not participate in the Drought Water Bank program
because other alternate supplies were available to meet Valley water demands.
For purposes of planning, CLWA's IWRP identified short-term deliveries of
20,000 acre-feet or more of water purchased from the state's Drought Water
Bank in dry years if needed, to augment the Valley's water supplies.
The Committee believes the Drought Water Bank to be an existing on going
Program to help water suppliers meet demands during dry years. The following
is an excerpt ,from the Department of Water Resources California Water Plan
Update Bulletin 160-98 providing additional information on the Drought Water
Bank:
"In 1991, after four consecutive years of drought, the Governor signed an
executive order establishing a Drought Action Team. The first emergency
June 24, 1996, American Society of Civil Engineer's North American Water and Environmental
Congress, Anaheim, CA.
-20
drought water bank was created in response to the team's
recommendations. The Department operated the DWB in coordination
with other agencies, including USBR, SWRCB, DFG, and local
governments. DWB's primary role was to purchase water from willing
sellers and sell it to entities with critical needs. Sellers made water
available to DWB by fallowing farmland, releasing surplus reservoir
storage, any be substituting groundwater for surface supplies.
During 1991, the DWB purchased about 820 taf of water under more than
300 short-term agreements. About half of that water came from fallowing
agreements. About 20 percent came from groundwater substitution
arrangements made with participating farmers and water districts. The
remainder of the water came from reservoir storage.
The 1991 DWB experience and contracts provided a basis for
administration of the 1992 DWB. In 1992, the Department purchased
about 190 taf of water, with 80 percent from groundwater substitution
contracts and 20 percent from reservoir storage. No land fallowing
contracts were executed. These conditions allowed the 1992 DWB to
operate at a significantly reduced cost for water. As with the 1991 DWB,
the 1992 DWB was able to acquire sufficient water to meet the critical
needs of all participants.
Drawing on the 1991 and 1992 DWB experiences, the Department
completed a programmatic environmental impact report that evaluated
different types of water marketing. The final EIR, release in 1993, covered
future drought water bank programs intended to meet water demands
during drought periods over the next 5 to 10 years, on an as -needed
basis. The program is a water purchase and allocation program whereby
the Department will purchase water from willing sellers and market the
water to buyers under specific critical needs allocations guidelines.
The DWB program would be implemented as needed for a particular year
upon an executive order of the Governor, a decision by the Secretary for
Resources, or upon a finding by the Department's Director that drought or
other unanticipated conditions exist that would significantly curtail water
deliveries. The program would continue to operate until water supplies
returned to n on critical levels.
In 1994, the Department reactivated the DWB and also initiated a short-
term water purchase program for SWP contractors. More than 170 taf of
water was delivered to cities and farms throughout the State. About 115
taf was delivered from DWB and 58 taf was delivered from the short-term
water purchase program. A comparison of the three DWBs is shown in
Table 3017.
The Department began to organize a 1995 DB in September 1994,
anticipating another drought year. By mid-November, water agencies had
signed contracts with the Department to purchase water from DWB for
-21
critical needs. The Department established DWB in an inactive status,
with the intent of activating it if 1995 precipitation was below normal.
While in inactive status, DWB purchased options on 29 taf of water from
live willing sellers. As a result of an abundance of precipitation and snow
pack through California in 1995, the DWB was not activated and the
Department did not exercise the acquired options."
It is important to note that there are several other state programs in place that
CLWA can utilize to "firm up" SWP supplies when they are reduced. A partial
listing of programs includes the Supplemental Water Purchase Program, the
Interruptible Water Service Program and the SWP Turn -back Pool. These
programs are discussed in detail in Section 3, page 3-16 of CLWA's /WRP. In
summary, these programs provide substantial opportunity for CLWA to increase
its water supply and effectively implement water management activities to
enhance supply reliability.
Local supply augmentation includes demand management programs (voluntary
and mandatory rationing programs) and conjunctive use of stored local
groundwater. For planning purposes, the Committee assumes that Valley
residents could voluntarily conserve 10 percent from their normal usage. This is
reasonable since conservation efforts during the last drought in 1991 were
approximately 20 percent.
As previously discussed, the Saugus Formation could produce up to 40,000
acre-feet of water per year. This assumes approximately 30,000 acre-feet of
water could be withdrawn on a short term basis from the Saugus Formation in
addition to the dry year recharge rate of 11,000 acre-feet. In order to achieve
this level of production, existing agricultural wells could be converted for
domestic use and/or new wells could be constructed.
At the present time, the Valley's primary supplies of groundwater, imported water
and recycled water are adequate to meet existing and projected demands for the
foreseeable future. As water demands increase CLWA and the other purveyors
will analyze and determine the most beneficial mix of supply options available on
a short term basis to meet customer demands. In summary, the Committee has
-22
identified approximately 50,000 acre-feet of firming water supplies (excluding 10
percent voluntary conservation) that is available to be used if and when SWP
supplies are reduced.
Section ILC Water Quality
Section II.C.1 Groundwater
The overall groundwater quality in the Santa Clarita Valley is considered good.
Groundwater produced by the local purveyors consistently meets drinking water
standards set by the Environmental Protection Agency (EPA) and the California
Department of Health Services (DHS). Tables II -1, II -2 and II -3 lists 1999's
groundwater quality results for Newhall County Water District, Santa Clarita
Water Company and Valencia Water Company, respectively. Water delivered by
Los Angeles County Waterworks District 36 is 100 percent imported water from
CLWA. Local groundwater is characterized as being moderately hard to hard
with Hardness (as CaCO3) ranging from 220 to 600 milligrams per liter (mg/L)
and Total Dissolved Solids (TDS) ranging from approximately 400 to 900 mg/L.
Currently, groundwater quality may become compromised by contaminants that
are not typically found in groundwater. Two such compounds are Methyl -tertiary -
butyl -ether (MTBE), a compound that is added to gasoline to improve air quality
and ammonium perchlorate (perchlorate), which is used to manufacture solid
rocket propellants, munitions, and fireworks. To date, routine monitoring has not
detected MTBE in any of the valley's drinking water wells. However, a few wells
within the Saugus Formation have tested positive for perchlorate. The Whittaker-
Bermite site in Santa Clarita has been identified as the potential source of
perchlorate contamination as a result of improper use or disposal of the
compound.
The Committee has retained Richard C. Slade and Associates to investigate the
extent of the problem and recommend viable treatment technologies that safely
remove perchlorate from water. Also, the Committee has met on several
-23
occasions with the property owners, the State Department of Toxic Substances
Control and the Los Angeles Regional Water Quality Control Board to ensure
that clean-up activities proceed expeditiously.
No federal or state drinking water standard exists for perchlorate. However, the
State Health Department has established a provisional action level of 18 parts
per billion in water and EPA is expected to propose a drinking water standard
within the next 18 months.
Section II.C.2 Imported Water
Table 11-4 shows the water quality results for imported water produced by CLWA.
CLWA operates two water treatment plants: the Earl Schmidt Filtration Plant
located in the Castaic area and the Rio Vista Water Treatment Plant located in
Saugus. CLWA produces water that meets drinking water standards set by EPA
and DHS. Imported water has different aesthetic characteristics than
groundwater with Hardness(as CaCO3) ranging from 85 to 230 milligrams per
liter (mg/L) and TDS of approximately 290 mg/L.
Section 111.101 Other Water Supplies
Section II.D.1 Water Recycling
Recycled water is available from two existing water reclamation plants operated
by the County Sanitation Districts of Los Angeles County. In 1993, CLWA
prepared a Reclaimed Water System Master Plan that outlined a multi -phase
program to deliver recycled water in the Valley. CLWA has completed
environmental review and is constructing phase I of the project which will deliver
approximately 1,700 acre -ft of water.
Surveys conducted by CLWA indicate a high interest for recycled water by
existing water users as well as future development when it becomes available.
The Committee encourages and supports the use of recycled water to help
augment and "drought proof' existing supplies. Overall, the program is expected
-24
to reclaim up to 10,000 acre-feet of highly treated (tertiary) wastewater suitable
for reuse on golf courses, landscaping and other non -potable uses.
Section ILE Precipitation
Section ILEA Precipitation Records
The Santa Clarita Valley is characterized as having an arid climate. Typically,
"dry" years (less than 10 inches per year) are followed by "wet" years (greater
than 20 inches per year) in a cyclical pattern. Long-term precipitation records at
the Newhall County Water District at the Saugus Power plant are illustrated in
Figures II -15 & 16. At those two stations, the long-term average precipitation is
19.4 inches (1927-1998) and 17.6 inches (1949-1995), respectively. On a
cumulative basis, the longest -term record (Newhall County Water District) shows,
in Figure II -17 small variations, generally slightly below long-term average, for
about the 20 -year period from the mid -1920's through the mid -1940's.
Subsequently, much of the overall next 30 year period was characterized by as
general below normal precipitation cycle (overall dry period) followed by an
overall above normal precipitation cycle from the mid -1970's to present, with
intervening average and slightly dry years in, the mid to late 1980's.
Section II.F Water Resource Monitoring
Much of what is reported in this Water Supplies Section is derived from the
individual records of the municipal water purveyors, the wholesale water supplier
Castaic Lake Water Agency, and the principal agricultural pumper Newhall Land
& Farming. Historically, there was some collection and maintenance of
groundwater data (notably water levels and quality) by the State Department of
Water Resources; however, that effort has been largely discontinued over the
last 20 years. Thus, while basic data continues to be measured by individual
pumpers in the basin, there is no ongoing effort to centrally collect and maintain
groundwater and other related resources data throughout the Santa Clarita
Valley. In that light, this 1999 Water Report represents the first effort by the
-2s
Committee to assemble historical records of precipitation, groundwater pumpage,
groundwater levels, and groundwater quality, and to interpret those data as
indicators of groundwater conditions and as a basis for conducting the reliable
amounts of water supply to meet ongoing and projected water demands in the
Valley.
In order that future annual reports can continue and potentially expand the
degree of detail included in this report, the Committee plans to integrate the
various individual components of groundwater and water resources monitoring
into an ongoing Valley -wide effort. The specific format and organization of data
base management are being developed at the present time. However, it is
expected that the water resources data base will include at least the following:
• Continuation of long-term precipitation records in the Valley
• Pumpage records for wells, subdivided by well completion (Alluvial and
Saugus aquifers)
• Surface water delivery records from Castaic Lake Water Agency to each
municipal water purveyor.
• Groundwater level measurements in a representative network of Alluvial
and Saugus wells on at least a semi-annual frequency (municipal wells
are currently measured monthly).
• Groundwater quality data from a representative network of Alluvial and
Saugus wells on a semi-annual to triennial frequency (for basin monitoring
purposes integrated with State Health Department requirements for
municipal groundwater supplies).
• Water quality data for imported water delivered to municipal purveyors.
6.T.9
Section III
Water Demands -Existing and Projected
Section IIIA 1999 Water Demand
Tables III -1, 111-2, 111-3 and 111.4 show deliveries of water from available sources
by each retail purveyor in 1999. Historical deliveries are also shown beginning in
1980. Table III -5 shows the total water production of the four water retailers.
Table 111-6 shows the water produced by agricultural and other miscellaneous
users in the valley.
Section 111.13 Projected Water Demand
The General Plan of the County of Los Angeles includes provisions known as the
Development Monitoring System (DMS) to give decision makers information
about the existing capacity of available public services, including water supply, at
the time new development is considered. Los Angeles County Regional
Planning Department maintains DMS and calculates the water demands for all
projects being processed for development. The County DMS lists all pending,
approved and recorded projects for which land divisions have been filed within
the unincorporated areas of the County in the Santa Clarita Valley and City of
Santa Clarita. Table 111-7 shows the total existing water demands as reported by
the retail purveyors for 1999, the total projected water demands for lands within
the study area of this report, and the long term agricultural and miscellaneous
uses.
1PJFJ
Section IV
Summary of Water Supply and Demand
Section IV -A Results for 1999
Table IVA shows a summary of the current available water supply, the total
water demand reported in 1999 by the purveyors and the projected water
demand generated from projects tracked by Los Angeles County's DMS. In
addition, long term agricultural and miscellaneous uses are provided to account
for additional water demands in the Valley. As stated in the Castaic Lake Water
Agency Integrated Water Resource Plan Water Demand and Supply Evaluation,
"Irrigation demands are expected to decline from about 12,000 acre-fbyr to 5,000
acre-fUyr in the future." Miscellaneous uses are 10 year calculated averages of
the remaining water supplies. Figure IVA compares the current available water
supply under varying conditions with total demand (existing and projected)
reported in DMS.
Figure IVA illustrates the supply options available to the purveyors from a wet
year to a dry year condition. In summary, the supply ranges from 156,900 acre-
feet to 142,800 acre-feet. In 1999, the existing water demand from all purveyors
is 57,250 acre-feet and the projected total water demand reported by Los
Angeles County Development Monitoring System is 22,660 acre-feet. In addition,
the long term agricultural and miscellaneous uses is projected at 7,100 acre-feet.
The Santa Clarita Valley currently has a surplus of supply that ranges from
55,800 to 69,900 acre-feet during varying water supply conditions over existing
and near term projected demand. The Committee projects this condition to
continue in 1999 and for the foreseeable future given the overall availability of
local and imported water supplies, the levels of precipitation both locally and
regionally, the favorable operating condition of the groundwater basin and the
existing facilities in place to deliver water throughout the valley.
&V
Section IV -B Water Supply Outlook
A significant number of local projects are part of an overall $500 million program
currently funded by CLWA to provide facilities needed to firm -up imported water
supplies during times of drought. This approach combines water conservation,
surface and groundwater storage, water transfers and exchanges, water
recycling, additional short term pumping from the Saugus Formation and
increasing CLWA's SWP supply. This overall strategy is designed to meet
increasing water demands while assuring a reasonable degree of supply
reliability.
In 2000, CLWA is planning to increase its supply of water from the SWP. Castaic
Lake Water Agency is considering acquiring up to an additional 20,000 acre-feet
of State Water Project Entitlement that will make the agency's existing
entitlements more reliable while adding new water to meet planned future
developments. Additionally, Phase I of the recycled water program is under
construction and will add initially 1,700 acre-feet and ultimately add up to 10,000
acre-feet to the area's water supply.
The retail water companies and CLWA strive to maintain a blend of groundwater
and imported water to area residents to ensure consistent quality and reliability of
service. The actual blend of water in any given year is an operational decision
and would vary over time between imported water and groundwater due to
source availability and operational capacity of local facilities. The goal is to
conjunctively use the available water resources so that the overall reliability of
water supply is maximized.
It should be noted that for long term planning purposes, water supplies and
facilities are added on an incremental basis and ahead of need. It would be
economically imprudent now, or in the short term, to acquire all the facilities and
water supplies needed for the next twenty to thirty years. This would represent
an unfair shift of costs from future customers to existing customers.
-29
There are many on-going efforts to produce an adequate and reliable supply of
good quality water for valley residents. Water consumers expect that their needs
are going to be met with a high degree of reliability and quality of service. To that
end, the Committee, through CLWA's IWRP has established a water reliability
criterion for planning purposes sufficient to meet projected demands 95 percent
of the time or in 19 of 20 years. In the remaining 5 percent of the time, it is
assumed that the maximum allowable supply shortage will be 10 percent of
demands.
This level was chosen because a 10 percent water demand reduction is feasible
during a drought based on past experience. When a shortage occurs, water
consumers typically increase their awareness of water usage and voluntarily
reduce water demands. During the last drought of the early 1990's, voluntary
conservation efforts by area residents resulted in a decrease in water demand of
about 20 percent per year.
-30
Section V
Water Conservation
Section V.A Current Practices
The following programs are administered by CLWA and supported by the retail
water purveyors. Public education and conservation programs are an important
element of the Committee's overall water plan to meet future water demands.
Youth Elementary Education Program
During the 1998/1999 school year, a total of 5,969 students and 186 teachers
participated in the CLWA's Elementary Education Program, provided as a
community service to students grades K-6. Conducted in partnership with the
Santa Clarita Valley (SCV) elementary schools, children in the program learned
different aspects about water and its importance to life. The California State -
accredited program offered by CLWA also included a pilot program on water for
grades K-3.
Thousands of education packets and materials featuring water conservation
messages were distributed through the Elementary Education Program and to
children attending public events (listed below). Examples of youth education item
giveaways are water conservation rulers (which graphically show that only 1/3 of
1% of Earth's water is available for consumption) and water bottles (which
display a penguin and the slogan "It's cool to be water -wise").
Water Conservatory Garden and Learning Center
Approximately 100 people per week visit the CLWA's Conservatory Garden and
Learning Center to learn more about water -wise landscaping. The seven -acre
garden in the heart of Santa Clarita Valley (SCV), features educational signage
and hundreds of varieties of roses and plants that are best suited for the extreme
climates of the SCV. A comprehensive Conservatory Garden Guide is available
in the Main Lobby of CLWA. The guide lists important planting details about the
-31
hundreds of plant species. The Conservatory Garden Docent Program provides
an opportunity for community volunteers to become involved in the maintenance
and public presentation of the Garden. Docents are in the Garden every
weekend and during most special events. In 1999, local residents and community
groups contributed a total of 2,661 volunteer docent hours.
Adult Landscape Education Program
A total of 472 adults participated in the 1998/99 Landscape Education Program,
which offered 11 monthly workshops on different aspects of water -wise
landscaping. The workshops are held each year from January through October at
the Conservatory Garden and Learning Center. Topics include Irrigation Basics,
Selecting Fall Plants, Soils and Landscape Design.
Speaker's Bureau
As another public service to the community, CLWA directors and staff serve as
speakers at local events and civic organization meetings. Since the program
inception in November 1997, over 300 people have attended Speaker Bureau
presentations on topics including: the Conservatory Garden and Learning
Center, the History of Water in California and in the SCV, the State Water Project
and CLWA Facilities, Water Quality, and the Elementary Education Program.
Each presentation begins and ends with a discussion of the value of water in our
State and in our Southern California desert region.
Public Information -Print and Broadcast Media, Direct Mail and Web Site
CLWA disseminates water conservation information in many of its public
materials and notifications, as described below.
Newspapers/Magazines/Directories: Press releases and advertisements
promoting water conservation and CLWA programs (as described above) are
submitted and appear throughout the year in: The Signal, the Daily News, the
Magazine of Santa Clarita and the SCV Chamber Business Directory.
-32
Direct t Mail: Approximately 50,000 1999 Water Quality Reports were mailed to
businesses and residences in accordance with State and Federal .law. CLWA
and the Agency's retail purveyors used the eight -page report to feature a series
of main headline statements on water conservation and preservation. One page
of the report was devoted to water conservation tips and information. On the
back cover of the report was a popular multiple-choice "Water IQ" test.
The CLWA newsletter. "Water Currents" was mailed in the same envelope with
the Water Quality Report. The message on the front of the envelope was: "Use
Water Wisely. Every Drop Counts." A subsequent envelope was printed with the
message, "Summer is Here. Use Water Wisely."
Each quarterly CLWA newsletter features a column called, "Use Your Fair Share"
which offers practical things people can do to save water. A new feature of Water
Currents is a column called "Talking (Purely) About Water".which provides
information on how people can preserve water resources.
Throughout the year, CLWA distributes a series of brochures entitled, "The Value
of Water," "Castaic Lake Water Agency," "The Conservatory Garden and
Learning Center," and the "CLWA Speakers Bureau." The "Value of Water'
brochures show tables and graphs of how much water is used for agriculture,
business, the environment and residential purposes. The other full-color
brochures in the series stress the importance of wise -water use.
The CLWA web site http://www.clwa.orp/ presents extensive up-to-date
information on many aspects of the Agency, its activities, and its facilities. The
web site features a variety of high resolution, color photos for browsers to select
to view. Since its inception, the CLWA web site received over 6,500 hits.
A bill -stuffier campaign featuring pre-printed AWWA stuffers is planned by CLWA
and its retailers for distribution in the Spring of 1999.
-33
Public Tours of Rio Vista Water Treatment Plant
To help people better understand and appreciate the treatment and transmission
of imported State Water Project water, public tours of Rio Vista Water Treatment
Plant are provided every Thursday and on the third Saturday of each month at 1
p.m. A total of 702 people toured the plant in 1999.
Public Events and Activities
To help people better understand and appreciate the water resources of the
State of California, CLWA conducted two State Water Project tours, a Water
Issues Committee, a Los Angeles County Public Library Program, and a
California Water Awareness Month Open House. CLWA also participated as an
exhibitor in the SCV Chamber of Commerce Business Mixer, and in the City of
Santa Clarita's River Rally. CLWA also participated in the October 1999
Business Expo, which was attended by approximately 13,000-15,000 people
attended. Thousands of individuals participated in the other CLWA and
community public events.
California State Water Awareness Campaign
About 700 guests attended the CLWA annual Open House, which celebrates
California Water Awareness Month. At the Open House, participants were asked
to provide a water saving tip to share with others. The tips are printed in CLWA
newsletters.
Civic/Private Special Events
In 1998, the public facilities of CLWA were used by dozens of community clubs
and organizations for meetings and receptions. The CLWA administrative
building and its adjacent Conservatory Garden also were used for a variety of
private celebrations throughout the year.
The objective of CLWA in opening its doors for public use was to provide wide-
spread exposure to the practice of water -wise landscaping and the basic
practices of water treatment and transmission. A total of 4,200 guests attended
civic and private special events held at CLWA. It is considered that the vast
-34
majority of these individuals would not have visited the water treatment plant and
conservation garden otherwise.
Many of the special events raised money for non-profit service organizations in
the community.
Water Conservation Giveaway Items
Thousands of water conservation items were distributed at the public events and
activities described above. Some of the items included:
Notepads - printed with the headline "Water is Precious. Use Water Wisely."
Toothbrushes - imprinted with the headline "Save Water. Turn Off Your Tap."
Magnets (2) - imprinted with public hours for the Garden and the Rio Vista
tours
Water Bottles (2) - imprinted with "It's Cool to be Water -Wise" and
CLWAlogos
Tote bags - imprinted with "Help Conserve and Preserve All Natural
Resources."
Poppy seeds - with text on planting this drought -resistant California State
Flower
Rio Vista Water Bottles - CLWA distributed thousands of bottles of water
treated at Rio Vista in an attempt to help local residents understand that their
tap water is safe to drink
Water Conservation Awards
In 1998, Castaic Lake Water Agency was awarded first place in The Association
of California Water Agencies (ACWA) Theodore Roosevelt Environmental
Award; was one of three finalists in the Clair A. Hill Award for Excellence; and
received three of nine first place awards in the Water Management Awareness
Program. During 1998, CLWA received certification in the ACWA Water
Management Program and was honored for their achievements at the ACWA Fall
Conference.
-35
Section VI
References
1. Castaic Lake Water Agency, 1998, Integrated Water Resources Plan, Water
Demand and Supply Evaluation prepared by Bookman Edmonston/Montgomery
Watson Consulting Engineers.
2. Robson, S.G., 1972, Water -Resources Investigation Using Analog Model
Techniques in the Saugus -Newhall Area, Los Angeles County, California: U.S.
Geological Survey, Open -File Report.
3. Slade, R. C., 1986, Hydrogeologic Investigation of Perennial Yield and Artificial
Recharge Potential of the Alluvial Sediments in the Santa Clarita River Valley of
Los Angeles County, California: Prepared for Upper Santa Clara Water
Committee, vols. I and II.
4. Slade, R. C., 1988, Hydrogeologic Assessment of the Saugus Formation in the
Santa Clara Valley of Los Angeles County, California: Prepared for Castaic Lake
Water Agency, vols. I and It.
5. Upper Santa Clara Valley Water Committee, 1985, Santa Clarita Urban Water
Management Plan, 1985-1990.
6. Newhall County Water District, 1996, Urban Water Management Plan Update.
7. Santa Clarita Water Company, 1996, Urban Water Management Plan Update.
8. Valencia Water Company, 1996, Urban Water Management Plan Update.
9. Department of Water Resources, 1998, The California Water Plan Update
Bulletin 160-98.
-36
10. Evaluation of historical and projected future flows to Ventura County resulting
from importation of State Project Water to the Santa Clara River watershed,
prepared by CH2M Hill, July, 1998.
11. Update to: Evaluation of historical and projected future flows to Ventura County
resulting from importation of State Project Water to the Santa Clara River
watershed, prepared by CH2M Hill.
12. United Water Conservation District„ Groundwater Department, 1999, Piru and
Fillmore Basins, Groundwater Conditions Report, Water Year 1998, prepared for
the AB3030 Groundwater Management Council.
13. Valencia Water Company, 1999, Water Management Program.
-37
Section VII
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Section VIII
Tables
Parameter
Newhall County Water District
1999 Groundwater Quality
Units MCL Range Ave
Range
Ave
Range
Ave
' y'STANDARD$ "
CLARITY
,pld'M
NTU
0.5
0.05-0,95
0.21
0.05-0.29
0.1
0.07 -0.47
0.18
MICROBIOLOGICAL
s oliform Bacteria (PA)
(+) Smp/ o.
<5
0-0%
0
0 - 0%
0
0 - 0%
0
tcai Coliform Bacteria (PA)
Acute violations
0
0
0
0
0
0
0
REGULATED ORGANIC CHEMICALS
-
Tnhalomethanes
mg/L
0.08
0.0036 - 0.0495
0.03
0.0532 - 0.073
0.0637
0.023 - 0.1225
0.074
ene
mg/L
0.001
<DLR
<DLR
<DLR
<DLR
<DLR
<OLR
n Tetrachloride
mg/L
0.0005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
. }Dichlorobenzene
mg/L
0.6
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
ppichlorobenzene
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
ichloroethane (1,1 -DCA)
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
z-0ichloroethane (1,2 -DCA)
mg/L
0.0005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
.Dichloroethylene (1,1-DCE)
mg/L
0.007
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
1,2-Dichloroethylene (c-1,2-DCE)
mg/L
0.006
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
ns•1,2-Dichlorethylene (t-1,2-DCE)
mg/L
0.01
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
I romethane
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
-0ichloropropane
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
,1Dichloropropene
mg/L
0.0005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
tlrybenzene
mg/L
0.7
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
nochlorbenzene
mg/L
0.07
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
ne
mg/L
0.1
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
1,2,2 -Tetrachloroethane
mg/L
0.001
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
abachloroethylene (PCE)
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Were
mg/L
0.15
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
,2,4-Trichlorobenzene
mg/L
0.07
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
,1,1-Trichloroethane(1,1,1-TCA)
mg/L
0.2
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
,1,2 -Trichloroethane (1,1,2 -TCA)
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
ochlorofluoromethane
mg/L
0.15
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
,1,2-Trichloro-1,2,2-Trifluoroethane
mg/L
1.2
<DLR
<DLR
<DLR
<DLR
,. <DLR
<DLR
nchloroethylene (TCE)
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
nyl Chloride
mg/L
0.0005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Penes
mg/L
1.75
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
ethyl Tert-Butyl Ether (MTBE)
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
'(2ethylhexyl)phthalate (DEHP)
mg/L
0.004
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Table 11-1
1 of 3
Newhall County Water District
1999
Groundwater
Quality
Parameter
Units
MCL
Range
Ave
Range
Ave
Range
Ave
UNggGULATED ORGANIC CHEMICALS
mg/L
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
pbenzene
dichloromethane
mg/L
mg/L
N/A
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
form
mg/L
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
-methane
mdibromomethane
mg/L
mg/L
N/A
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
methane
rm
mg/L
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
mg/L
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
rornethane
mg/L
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
rotoluene
mg/L
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Iorotoluene
mg/L
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
mamethane
�.pichlorobenzene
lorodifluoromethane
mgIL
mg/L
N/A
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
�.pichloropropane
ichloropropane
1-Dichloropropene
t9-Tetrachloroethane
Tri omg/L
loromethane ne
mochethan
utylbenzene
Butylbenzene
Autylbenzene
chiorobutadiene
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
N/A
N/A
NIA
N/A
N/A
N/A
N/A
N/A
N/A
NIA
<OLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<OLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
I <DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<OLR
<DLR
<DLR
<DLR
<OLR
propyltoluene
propyltoluene
I•Phenylpropane
,2,3-Trichlorobenzene
2,4-Trimethylbenzene
,3,5-Trimethylbenzene
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
N/A
N/A
N/A
NIA
N/A
N/A
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
I
Table II-1
i
2of3
Table II -1
3of3
Parameter
Newhall County Water District
1999 Groundwater Quality
Units MCL Range Ave
Range
Ave
Range
Ave
}
INORGANIC CHEMICALS
rrninum
mg/L
1.0
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Umony
mg/L
0.006
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
enic
mg/L
0.05
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
dum
mg/L
1.0
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
l n,
mg/L
0.004
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
dmium
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
mium
mg/L
0.05
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
'de
mg/L
2.0
0.1-0.3
0.2
0.3
0.3
0.4-0.55
0.5
d
mg/L
0.05
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
rcury
mg/L
0.002
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
r
tkel
mg/L
0.1
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
to (as Nitrogen)
mg/L
10.0
1.5-7.6
4.2
1.9-5.2
3.3
0-0.4
0.2
enium
mg/L
0.05
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
E Ilium
mg/L
0.002
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
RADIOACTIVITY
I s Alpha Activity
p i/L
15
2.0-3.0
2.45
0.1-9.0
4.1
0.7-3
1.7
Beta Activity
pCi/L
50
N/A
N/A
N/A
N/A
N/A
N/A
UUum
pCVL
20,000
N/A
N/A
N/A
N/A
N/A
N/A
ntium 90
pCYL
8
N/A
N/A
N/A
N/A
N/A
N/A
ium 226 & 228 combined
pCi/L
5
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
nium
pCi/L
20
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
CONDARY-STANDARD
r_
for
Units
15
<5 - <5
<5
<5 - <5
<5
<5. <5
<5
.Peer
mg/L
1.0
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
lodde
mg/L
500
35.5-59.1
44.6
44.1-90.5
62.6
42.9-65
56.1
ming Agents (MBAS)
mg/L
0.5
<DLR - 0.08
<DLR
<DLR - 0.07
<DLR
<DLR
<DLR
mg/L
0.3
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
- anganese
mg/L
0.05
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
or•Threshold
Units
3
1-1
1
1-1
1
1- 1
1
Ner
mg/L
0.1
<DLR
<DLR
<DLR
<DLR I
<DLR
<DLR
pacific Conductance
umhos
1,600
748-928
852
692-932
799
790-1012
861
Ifate
mg/L
500
146-235
188
76.1-85.7
82.5
138-369
218
atal Dissolved Solids
mg/L
1,000
440.600
535
444-616
504
514-728
578
nc
mg/L
5.0
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
ADDITIONAL CONSTITUENTS ANALYZED
Units
7.38-7.98
7.57
8.39-8.41
8.40
7.3-8.3
7.60
ardness(CaCO3)
mg/L
88-555
346
246-307
273
253-410
299
ium
mg/L
53.6-153
82
55-109
82.3
73-81
77.5
ium
mg/L
27.8-160
99.2
69.9-90
78.1
65-102
74.6
ssium
mg/L
2.1-2.8
2.4
3.1
3.1
3.5-3.9
3.8
nesium
mg/L
4.41-41.6
23.7
17.4-20
18.9
22-38
27.3
hlorate
14ap(d
mg/L
0.018
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
LEAD AND COPPER TAP SAMPLING
per 90th Percentile
mg/L
1.3
N/A
0.375
N/A
1.3
N/A
0.518
90th Percentile
mg/L
0.015
N/A
0.0050
N/A
0.0050
N/A
0.0050
Table II -1
3of3
Santa Clarita Water Company
1999 Groundwater Quality
Parameter Units MCL Range Average
PRIMARY STANDARDS
CLARITY
Turbidity
NTU
0.5
0.03-0.04
0.04
MICROBIOLOGICAL
Total Coliform Bacteria (PA)
(+) SMP/Mo. 1
<5%
0 - 1%
0
Fecal Coliform Bacteria PA
Acute violations 1
0
0 1
0
REGULATED ORGANIC CHEMICALS
Total Trihalomethanes
mg/L
0.08 1
0.044 - 0.059
0.053
Benzene
m /L
0.001
<DLR
<DLR
Carbon Tetrachloride
m /L
0.0005
<DLR
<DLR
1,2 -Dichlorobenzene
m /L
0.6
<DLR
<DLR
1,4 -Dichlorobenzene
m /L
0.005
<DLR
<DLR
1,1-Dichloroethane 1,1 -DCA
m /L
0.005
<DLR
<DLR
1,2-Dichloroethane 1,2 -DCA
m /L
0.0005
<DLR
<DLR
1,1-Dichloroeth leve 1,1-DCE
m /L
0.007
<DLR
<DLR
cis-1,2-Dichloroeth lene c-1,2-DCE
m /L
0.006
<DLR
<DLR
trans-1,2-Dichloreth lene t-1,2-DCE
m /L
0.01
<DLR
<DLR
Dichloromethane
m /L
0.005
<DLR
<DLR
1,2-Dichlororo ane
m /L
0.005
<DLR
<DLR
1,3-Dichloro ro ene
m /L
0.0005
<DLR
<DLR
Eth (benzene
m /L
0.7
<DLR
<DLR
Monochlorbenzene
m /L
0.07
<DLR
<DLR
Styrene
m /L
0.1
<DLR
<DLR
1,1,2,2 -Tetrachloroethane
m /L
0.001
<DLR
<DLR
Tetrachloroethylene PCE
m /L
0.005
<DLR
<DLR
Toluene
m /L
0.15
<DLR
<DLR
1,2,4-Trichlorobenzene
m /L
0.07
<DLR
<DLR
1,1,1 -Trichloroethane 1,1,1 -TCA
m /L
0.2
<DLR
<DLR
1,1,2 -Trichloroethane 1,1,2 -TCA
m /L
0.005
<DLR
<DLR
Trichlorofluoromethane
m /L
0.15
<DLR
<DLR
1,1,2-Trichloro-1,2,2-Tdfluoroethane
m /L
1.2
<DLR
<DLR
Trichloroethylene (TCE)
m /L
0.005
<DLR
<DLR
Vinvi Chloride
m /L
0.0005
<DLR
<DLR
Xylenes
m /L
1.75
<DLR
<DLR
Methyl Tert-Butyl Ether MTBE
m /L
0.005
<DLR
<DLR
Di 2-eth (hex I hthalate DEHP
m /L 1
0.004
<DLR
<DLR
Table II -2
1 of 3
Santa Clarita Water Company
1999 Groundwater Quality
Parameter Units MCL Range Average
UNREGULATED ORGANIC CHEMICALS
Bromobenzene
mg/L
N/A
<DLR
<DLR
Bromodichloromethane
m /L
N/A
<DLR
<DLR
Bromoform
m /L
N/A
<DLR
<DLR
Bromomethane
m /L
N/A
<DLR
<DLR
Chlorodibromomethane
m /L
N/A
<DLR
<DLR
Chloroethane
m /L
N/A
<DLR
<DLR
Chloroform
m /L
N/A
<DLR
<DLR
Chloromethane
m /L
N/A
<DLR
<DLR
2-Chlorotoluene
m /L
N/A
<DLR
<DLR
4-Chlorotoluene
m /L
N/A
<DLR
<DLR
Dibromomethane
m /L
N/A
<DLR
<DLR
1,3 -Dichlorobenzene
m /L
N/A
<DLR
<DLR
Dichlorodifluoromethane
m /L
N/A
<DLR
<DLR
1,3-Dichloro ro ane
m /L
N/A
<DLR
<DLR
2,2-Dichloro ro ane
m /L
N/A
<DLR
<DLR
1,1-Dichloro ro ene
m /L
N/A
<DLR
<DLR
1,1,1,2 -Tetrachloroethane
m /L
N/A
<DLR
<DLR
1,2,3-Trichloro ro ane
m /L
N/A
<DLR
<DLR
Bromochloromethane
m /L
N/A
<DLR
<DLR
n -Bu (benzene
m /L
N/A
<DLR
<DLR
sec -Bu (benzene
m /L
N/A
<DLR
<DLR
tert-Bu (benzene
m /L
N/A
<DLR'
<DLR
Hexachlorobutadiene
m /L
N/A
<DLR
<DLR
Iso ro (toluene
m /L
N/A
<DLR
<DLR
Iso ro (toluene
m /L
N/A
<DLR
<DLR
1-Phen I ro ane
m /L
N/A
<DLR
<DLR
1,2,3-Trichlorobenzene
m /L
N/A
<DLR
<DLR
1,2,4-Trimeth Ibenzene
m /L
N/A
<DLR
<DLR
1,3,5-Trimeth (benzene
m /L
N/A
<DLR
<DLR
Table 11-2
2of3
Santa Clarita Water Company
1999 Groundwater Quality
Parameter Units MCL Range Average
PRIMARY STANDARDS
INORGANIC CHEMICALS
Aluminum
mg/L
1.0
<DLR
<DLR
Antimonym
/L
0.006
<DLR
<DLR
Arsenic
m /L
0.05
0.0027 - 0.0043
0.0038
Barium
m /L
1.0
<DLR
<DLR
Beryllium
m /L
0.004
<DLR
<DLR
Cadmium
m /L
0.005
<DLR
<DLR
Chromium
m /L
0
<DLR
<DLR
Fluoride
m /L
2.0
0.3-0.6
0.38
Lead
m /L
0.05
<DLR
<DLR
Mercury
m /L
0.002
<DLR
<DLR
Nickel
m /L
0.1
<DLR
<DLR
Nitrate as Nitrogen)
m /L
10.0
2.2-4.7
3.4
Selenium
m /L
0.05
<DLR
<DLR
Thallium
m /L
0.002
<DLR I
<DLR
RADIOACTIVITY
Gross Alpha Activity
pCi/L
15
<DLR - 7.4
2.6
Gross Beta Activity
Ci/L
50
<DLR -12.9
1.8
Tritium
Ci/L
20,000
NA
NA
Strontium 90
Ci/L
8
NA
NA
Radium 226 & 228 combined
pCUL
5
NA
NA
Uranium
Ci/L
20
2.86-5.11
4.0
SECONDARY STANDARDS
Color
Units
15
<5 - <5
<5
Copper
m /L
1.0
<DLR
<DLR
Chloride
m /L
500
43.6-59.0
51.9
Foaming Agents (MBAS)
m /L
0.5
<DLR
<DLR
Iron
m /L
0.3
<DLR
<DLR
Manganese
m /L
0.05
<DLR
<DLR
Odor -Threshold
Units
3
1 - 1
1
Silver
m /L
0.1
<DLR
<DLR
Specific Conductance
umhos
1,600
689-889
799
Sulfate
m /L
500
80.6-140.0
109.5
Total Dissolved Solids
m /L
1,000
4387576
513.8
Zinc
m /L
5.0
<DLR
<DLR
ADDITIONAL CONSTITUENTS ANALYZED
pH
Units
N/A
7.44-7.59
7.50
Hardness CaCO3
m /L
N/A
254-336
295
Sodium
m /L
N/A
54-66
61
Calcium
m /L
N/A
71-92
77
Potassium
m /L
N/A
1.7-3.1
2.6
Magnesium
m /L
N/A
19-37
25
Perchlorate
m /L
0.018
<DLR
<DLR
LEAD AND COPPER TAP SAMPLING
Copper 90th Percentile
mg/L
1.3
0.138
Lead 90th Percentile
m /L
0.015
<0.005
Table 11-2
3of3
Valencia Water Company
1999 Groundwater Quality
Parameter Units MCL Rance Average
PRIMARY STANDARDS
CLARITY
Turbidity
NTU
5
0.04- 0.97
0.09
MICROBIOLOGICAL
Total Coliform Bacteria (PA)
(+) Smp/Mo.
<5%
0 - 0%
0.00
Fecal Coliform Bacteria PA
Acute violations
0
1 0-0%
0%
REGULATED ORGANIC CHEMICALS
Total Trihalomethanes
mg/L
0.08
0.061 - 0.078
0.07
Benzene
m /L
0.001
<DLR
<DLR
Carbon Tetrachloride
m /L
0.0005
<DLR
<DLR
1,2 -Dichlorobenzene
m /L
0.6
<DLR
<DLR
1,4 -Dichlorobenzene
m /L
0.005
<DLR
<DLR
1,1-Dichloroethane 1,1 -DCA
m /L
0.005
<DLR
<DLR
1,2-Dichloroethane 1,2 -DCA
m /L
0.0005
<DLR
<DLR
1,1-Dichloroeth lene 1,1-DCE
m /L 1
0.007
<DLR
<DLR
cis-1,2-Dichloroeth lene c-1,2-DCE
m /L
0.006
<DLR
<DLR
trans-1,2-Dichloreth lene t-1,2-DCE
m /L
0.01
<DLR
<DLR
Dichloromethane
m /L
0.005
<DLR
<DLR
1,2-Dichloro ro ane
m /L
0.005
<DLR
<DLR
1,3-Dichloro ro ene
m /L
0.0005
<DLR
<DLR
Eth (benzene
m /L
0.7
<DLR
<DLR
Monochlorbenzene
m /L
0.07
<DLR
<DLR
Styrene
m /L
0.1
<DLR
<DLR
1,1,2,2 -Tetrachloroethane
m /L
0.001
<DLR
<DLR
Tetrachloroethylene PCE
m /L
0.005
<DLR
<DLR
Toluene
m /L
0.15
<DLR
<DLR
1,2,4-Trichlorobenzene
m /L
0.07
<DLR
<DLR
1,1,1 -Trichloroethane 1,1,1 -TCA
m /L
0.2
<DLR
<DLR
1,1,2 -Trichloroethane 1,1,2 -TCA
m /L
0.005
<DLR
<DLR
Trichlorofluoromethane
m /L
0.15
<DLR
<DLR
1,1,2-Trichloro-1,2,2-Trifluoroethane
m /L
1.2
<DLR
<DLR
Trichloroethylene (TCE)
m /L
0.005
<DLR
<DLR
Vinyl Chloride
m /L
0.0005
<DLR
<DLR
Xylenes
m /L
1.75
<DLR
<DLR
Methyl Tert-Butyl Ether MTBE
m /L
0.005
<DLR
<DLR
Di(2-eth (hex I)phthalate DEHP
m /L
0.004
<DLR
<DLR
Table II -3
1 of 3
Valencia Water Company
1999 Groundwater Quality
Parameter Units MCL Range Average
UNREGULATED ORGANIC CHEMICALS
Bromobenzene
mg/L
N/A
<DLR
<DLR
Bromodichloromethane
m /L
N/A
<DLR
<DLR
Bromoform
m /L
N/A
<DLR
<DLR
Bromomethane
m /L
N/A
<DLR
<DLR
Chlorodibromomethane
m /L
N/A
<DLR
<DLR
Chloroethane
m /L
N/A
<DLR
<DLR
Chloroform
m /L
N/A
<DLR
<DLR
Chloromethane
m /L
N/A
<DLR
<DLR
2-Chlorotoluene
m /L
N/A
<DLR
<DLR
4-Chlorotoluene
m /L
N/A
<DLR
<DLR
Dibromomethane
m /L
N/A
<DLR
<DLR
1,3 -Dichlorobenzene
m /L
N/A
<DLR
<DLR
Dichlorodifluoromethane
m /L
N/A
<DLR
<DLR
1,3-Dichloro ro ane
m /L
N/A
<DLR
<DLR
2,2-Dichloro ro ane
m /L
N/A
<DLR
<DLR
1,1-Dichloro ro ene
m /L
N/A
<DLR
<DLR
1,1,1,2 -Tetrachloroethane
m /L
N/A
<DLR
<DLR
1,2,3-Trichloro ro ane
m /L
N/A
<DLR
<DLR
Bromochloromethane
m /L
N/A
<DLR
<DLR
n -Bu (benzene
m /L
N/A
<DLR
<DLR
sec -Bu (benzene
m /L
N/A
<DLR
<DLR
tert-Bu (benzene
m /L
N/A
<DLR
<DLR
Hexachlorobutadiene
m /L
N/A
<DLR
<DLR
Iso ro (toluene
m /L
N/A
<DLR
<DLR
Iso ro (toluene
m /L
N/A
<DLR
<DLR
1-Phen I ro ane
m /L
N/A
<DLR
<DLR
1,2,3-Trichlorobenzene
m /L
N/A
<DLR
<DLR
1,2,4-Trimeth (benzene
m /L
N/A
<DLR
<DLR
1,3,5-Trimeth (benzene
m /L
N/A
<DLR
<DLR
Table II -3
2of3
Valencia Water Company
1999 Groundwater Quality
D.,.meter Units MCL Range Average
PRIMARY. STANDARDS
INORGANIC CHEMICALS
Aluminum
mg/L
1.0
<DLR
<DLR
Antimony
m /L
0.006
<DLR
<DLR
Arsenic
m /L
0.05
0.0017 - 0.0039
0.0028
Barium
m /L
1.0
<DLR
<DLR
Beryllium
m /L
0.004
<DLR
<DLR
Cadmium
m /L
0.005
<DLR
<DLR
Chromium
m /L
0.05
<DLR
<DLR
Fluoride
m /L
2
0.2-0.82
0.37
Lead
m /L
0.05
<DLR
<DLR
Mercury
m /L
0.002
<DLR
<DLR
Nickel
m /L
0.1
<DLR
<DLR
Nitrate as Nitrogen)
m /L
10.0
1.2-7.0
4.1
Selenium
m /L
0.05
<DLR
<DLR
Thallium
m /L
0.002
<DLR
<DLR
RADIOACTIVITY
Gross Alpha Activity
pCi/L
15
<DLR - 7.8
4.37
Gross Beta Activit
Ci/L
50
NA
NA
Tritium
Ci/L
20,000
NA
NA
Strontium 90
Ci/L
8
NA
NA
Radium 226 & 228 combined
Ci/L
5
<DLR - 2.83
0.62
Uranium
Ci/L
20
1.22-4.3
1.99
SECONDARY STANDARDS''.'
-77777
Color
Units
15
<5 - <5
<5
Copper
m /L
1.0
<DLR
<DLR
Chloride
m /L
500
43.3-64.8
55.9
Foaming Agents (MBAS)
m /L
0.5
<DLR
<DLR
Iron
m /L
0.3
<DLR
<DLR
Manganese
m /L
0.05
<DLR
<DLR
Odor -Threshold
Units
3
1-1
1
Silver
m /L
0.1
<DLR
<DLR
Specific Conductance
umhos
1,600
1 785-1227
940
Sulfate
m /L
500
182-357
209
Total Dissolved Solids
m /L
1,000
491-767
587
Zinc
m /L
5.0
<DLR
<DLR
ADDITIONAL CONSTITUENTS ANALYZED
pH
Units
N/A
7.19-7.78
7.52
Hardness CaCO3
m /L
N/A
259-603
352
Sodium
m /L
N/A
55.7-80
66.2
Calcium
m /L
N/A
87-145
102.5
Potassium
m /L
N/A
2.7-3.7
3.3
Magnesium
m /L
N/A
24-37
29
Perchlorate
m /L
0.018
<DLR
<DLR
LEAD AND COPPER TAP SAMPLING
Copper 90th Percentile
mg/L
1.3
NA
154.5
Lead 90th Percentile
m /L
0.015
NA
6.2
Table II -3
3of3
Castaic Lake Water Agency
1999 Imported Water Quality
Parameter Units MCL Range Average
PR/MARYSTANDARDS
CLARITY
Turbidity
NTU
0.5
0.04-0.17
0.05
MICROBIOLOGICAL
Total Coliform Bacteria (PA)
SMP/Mo. 1
<5%
0-3
0
Fecal Coliform Bacteria PA
Acute violations 1
0
0
0
REGULATED ORGANIC CHEMICALS
Total Trihalomethanes
mg/L
0.08
52-56
54
Benzene
m
/L
0.001
<DLR
<DLR
Carbon Tetrachloride
m
/L
0.0005
<DLR
<DLR
1,2 -Dichlorobenzene
m
/L
0.6
<DLR
<DLR
1,4 -Dichlorobenzene
m
/L
0.005
<DLR
<DLR
1, 1 -Dichloroethane 1,1 -DCA
m
/L
0.005
<DLR
<DLR
1,2-Dichloroethane 1,2 -DCA
m
/L
0.0005
<DLR
<DLR
1,1-Dichloroeth lene 1,1-DCE
m
/L 1
0.007
<DLR
<DLR
cis-1,2-Dichloroeth lene c-1,2-DCE
m
/L
0.006
<DLR
<DLR
trans-1,2-Dichloreth lene t-1,2-DCE
m
/L
0.01
<DLR
<DLR
Dichloromethane
m
/L
0.005
<DLR
<DLR
1,2-Dichioro ro ane
m
/L
0.005
<DLR
<DLR
1,3-Dichloro ro ene
m
/L
0.0005
<DLR
<DLR
Eth (benzene
m
/L
0.7
<DLR
<DLR
Monochlorbenzene
m
/L
0.07
<DLR
<DLR
Styrene
m
/L
0.1
<DLR
<DLR
1,1,2,2 -Tetrachloroethane
m
/L
0.001
<DLR
<DLR
Tetrachloroethylene PCE
m
/L
0.005
<DLR
<DLR
Toluene
m
/L
0.15
<DLR
<DLR
1,2,4-Trichlorobenzene
m
/L
0.07
<DLR
<DLR
1,1,1 -Trichloroethane 1,1,1 -TCA
m
/L
0.2
<DLR
<DLR
1,1,2 -Trichloroethane 1,1,2 -TCA
m
/L
0.005
<DLR
<DLR
Trichlorofluoromethane
m
/L
0.15
<DLR
<DLR
1,1,2-Tdchloro-1,2,2-Trifluoroethane
m
/L
1.2
<DLR _
<DLR
Trichloroethylene (TCE)
m
/L
0.005
<DLR
<DLR
Vinyl Chloride
m
/L
0.0005
<DLR
<DLR
Xylenes
m
/L1.75
<DLR
<DLR
Methyl Tert-Butyl Ether MTBE
m
/L
0.005
<DLR
<DLR
Di 2-eth (hex I hthalate DEHP
m
/L
0.004
<DLR
<DLR
Table II -4
1 of 3
Castaic Lake Water Agency
1999 Imported Water Quality
Parameter Units MCL Range Average
UNREGULATED ORGANIC CHEMICALS
Bromobenzene
mg/L
N/A
<DLR
<DLR
Bromodichloromethane
m /L
N/A
<DLR.
<DLR
Bromoform
m /L
N/A
<DLR
<DLR
Bromomethane
m /L
N/A
<DLR
<DLR
Chlorodibromomethane
m /L
N/A
<DLR
<DLR
Chloroethane
m /L
N/A
<DLR
<DLR
Chloroform
m /L
N/A
<DLR
<DLR
Chloromethane
m /L
N/A
<DLR
<DLR
2-Chlorotoluene
m /L
N/A
<DLR
<DLR
4-Chlorotoluene
m /L
N/A
<DLR
<DLR
Dibromomethane
m /L
N/A
<DLR
<DLR
1,3 -Dichlorobenzene
m /L
N/A
<DLR
<DLR
Dichlorodifluoromethane
m /L
N/A
<DLR
<DLR
1,3-Dichloro ro ane
m /L
N/A
<DLR
<DLR
2,2-Dichloro roane
m /L
N/A
<DLR
<DLR
1,1-Dichloro ro ene
m /L
N/A
<DLR
<DLR
1,1,1,2 -Tetrachloroethane
m /L
N/A
<DLR
<DLR
1,2,3-Trichloro ro ane
m /L
N/A
<DLR
<DLR
Bromochloromethane
m /L
N/A
<DLR
<DLR
n -Bu (benzene
m /L
N/A
<DLR
<DLR
sec -Bu (benzene
m /L
N/A
<DLR
<DLR
tert-Bu (benzene
m /L
N/A
<DLR
<DLR
Hexachlorobutadiene
m /L
N/A
<DLR
<DLR
Iso ro (toluene
m /L
N/A
<DLR
<DLR
Iso ro (toluene
m /L
N/A
<DLR
<DLR
1-Phen I ro ane
m /L
N/A
<DLR
<DLR
1,2,3-Trichlorobenzene
m /L
N/A
<DLR
<DLR
1,2,4-Trimeth (benzene
m /L
N/A
<DLR
<DLR
1,3,5-Trimeth (benzene
m /L
N/A
<DLR
<DLR
Table 11-4
2of3
Castaic Lake Water Agency
1999 Imported Water Quality
Parameter Units MCL Ranae Ovamna
RR/MARYSTANDARDS 1.1 1,
p
INORGANIC CHEMICALS
Aluminum
mg/L
1.0
<DLR
<DLR
Antimony
m /L
0.006
<DLR
<DLR
Arsenic
m /L
0.05
2-3
2
Barium
m /L
1.0
<DLR
<DLR
Beryllium
m /L
0.004
<DLR
<DLR
Cadmium
m /L
0.005
<DLR
<DLR
Chromium
m /L
0.05
<DLR
<DLR
Fluoride
m /L
2.0
0.2-0.3
0.3
Lead
m /L
0.05
<DLR
<DLR
Mercury
m /L
0.002
<DLR
<DLR
Nickel
m /L
0.1
<DLR
<DLR
Nitrate as Nitrogen)
m /L
10.0
<DLR
<DLR
Selenium
m /L
0.05
<DLR
<DLR
Thallium
m /L
0.002
<DLR
<DLR
RADIOACTIVITY
Gross Alpha Activity
pCi/L
15
<DLR
<DLR
Gross Beta Activity
Ci/L
50
<DLR
<DLR
Tritium
Ci/L
20,000
<DLR
<DLR
Strontium 90
Ci/L
8
<DLR
<DLR
Radium 226 & 228 combined
Ci/L
5
<DLR
<DLR
Uranium
Ci/L
20
<DLR
<DLR
SECONDARY STANDARDS s'd..
Color
Units
15
<5-5
<5
Copper
m /L
1.0
<DLR
<DLR
Chloride
m /L
500
42-48
45
Foaming Agents (MBAS)
m /L
0.5
<DLR
<DLR
Iron
m /L
0.3
<DLR
<DLR
Manganese
m /L
0.05
<DLR
<DLR
Odor -Threshold
Units
3
1-1
1
Silver
m /L
0.1
<DLR
<DLR
Specific Conductance
umhos
1,600
N/A
505
Sulfate
m /L
500
81-107
97
Total Dissolved Solids
m /L
1,000
N/A
325
Zinc ---M
/L
5.0
<DLR
<DLR
ADDITIONAL CONSTITUENTS ANALYZED
pH
Units
N/A
N/A
8.10
Hardness CaCO3
m /L
N/A
N/A
183
Sodium
m /L
N/A
N/A
40
Calcium
m /L
N/A
N/A
43
Potassium
m /L
N/A
N/A
2.7
Magnesium
m /L
N/A
N/A
18
Perchlorate
m /L
0.018
<DLR
<DLR
LEAD AND COPPER TAP SAMPLING
Copper 90th Percentile I
mg/L
1.3
N/A
N/A
Lead 90th Percentile I
m /L 1
0.015
N/A
N/A
Table 11-4
3of3
Water Production
Los Angeles County Waterworks District 36
Acre -Feet Per Year
Table III -1
Water Production
Newhall County Water District
Acre -Feet Per Year
9Y..M xYV mLM1I F.Tn`m T"G5^^
'?
16 go
"'1f.'b'
T4 �1 d"n
p
�"
- 9
n...no.'Aa
=15,
d'
ry
Re
Table III - 2
Water Production
Santa Clarita Water Company
Acre -Feet Per Year
Appypppy d 3 ffpp ����j�j�jj�pa�ar+�
�kxt'.w°yw :sw py��^!MM6i
RU $a®
frsFN��
S� @i
�. INe�
dt G tY
Wre
A
3nx
t�`.A
Table III - 3
Water Production
Valencia Water Company
Acre -Feet Per Year
Table III - 4
a
73%
2,206
27%
0
0%
8,201
5,995
5,597
61%
2,329
25%
1,214
13%.
9,140
3,415
46°/a
897
12%
3,060
42%
7,372
3,387
44%
611
8%
3,764
48%
7,762
4,975
50%
854
9%
4,140
42%
9,969
4,633
46%
885
9%
4,641
46%
10,159
5,167
44%
1,427
12%
5,051
43%
11,645
4,921
40%
1,305
11%
6,190
50%
12,416
4,835
34%
2,300
16%
7,027
50%
14,162
5,826
36%
2,529
16%
7,943
49%
16,298
5,232
32%
3,516
21%
7,824
47%
16,572
9,951
65%
4,642
30%
700
5%
15,293
6,615
43%
2,385
16%
6,338
41%
15,338
5,815
35%
2,182
13%
8,424
51%
16,421
6,847
39%
2,565
15%
7,978
46%
17,390
8,698
50%
1,586
9%
7,259
41%
17,543
12,433
63%
326
2%
6,962
35%
19,721
11,696
53%
516
2%
9,919
45%
22,131
10,711
54%
149
1%
9,014
45%
19,874
11,823
52% 1
106
<1%
10,806
48%
22,735
Table III - 4
Total Water Production
Water Purveyors (a)
Acre -Feet Per Year
16,625
74%
4,569
20%
1,125
5%
22,319
14,056
57%
4,950
20%
5,816
23%
24,822
8,684
40%
3,569
16%
9,659
44%
21,912
8,803
41%
3,398
16%
9,185 1
43%
21,386
12,581
46%
3,809
14%
10,996
40%
27,386
12,519
44%
4,140
15% .
11,823
42%
28,482
12,418
40%
4,975
16%
13,759
44%
31,152
12,630
37%
4,962
15%
16,285
48%
33,877
12,197
32%
6,404
17%
19,033
51%
37,634
13,978
33%
7,217
17%
21,618
50%
42,813
13,151
31%
8,302
19%
21,613
50%
43,066
17,408
44%
14,417
36%
7,968
20%
39,793
16,897
41%
10,458
25%
13,911
34%
41,266
19,808
46%
10,151
23%
13,393
31%
43,352
20,068
44%
11,531
25%
14,389
31%
45,988
20,590
45%
8,087
18%
16,996
37%
45,673
24,681
49%
7,373
15%
18,093
36%
50,147
25,273
47%
6,752
12%
22,148
41%
54,173
23,898
49%
4,706
10%
20,254
41%
48,858
27,240
48% 1
2,728
5%
27,282 1
48%
57,250
(a) Includes LACWD 36, NCWD, SCWD, VWC
Table III - 5
Water Production
Agriculture and Miscellaneous Uses
Acre -Feet Per Year
11,331
20
11,351
3,000
0
3,000
500
0
13,237
20
13,257
3,000
0
3,000
500
0
9,684
20
9,704
3,000
0
3,000
500
501
7,983
20
8,003
3,000
0
3,000
500
434
11,237
20
11,257
3,000
0
3,000
500
620
9,328
20
9,348
3,000
0
3,000
500
555
8,287
20
8,307
3,000
0
3,000
500
490
6,512
20
6,532
3,000
0
3,000
500
579
5,951
20
5,971
3,000
0
3,000
500
504
6,243
20
6,263
3,000
0
3,000
500
522
8,225
20
8,245
2,000
0
2,000
500
539
7,039
20
7,059
2,240
0
2,240
500
480
8,938
20
.8,958
1,256
987
2,243
500
446
8,020
20
8,040
1,798
443
2,241
500
439
10,606
20
10,626
1,959
311
2,270
500
474
11,174
20
11,194
2,200
6
2,206
500
453
12,020
266
12,286
1,237
780
2,017
500
547
12,826
445
13,271
1,000
1,067
2,067
500
548
10,250
426
1 10,676
2,000
12
2,012
500
423
13,824
479
14,303
1,842
20
1,862
500
509
a) Includes estimated Miscellaneous Uses.
VCC = Valencia Country Club
Table III - 6
Existing and Projected Water Demand
Total Existing Demand Reported by Purveyors -1999 (1) 1 1 57,250
Development Monitoring System (2)
Pending Projects 9,348
Approved Projects 9,622
Recorded Projects 3,690
Projected Purveyor Water Demand 22,660
Long Term Agricultural and Miscellaneous Uses 7,100
Total Existing and Projected Water Demand 87,010
(1) From Table III - 5
(2) Los Angeles County Regional Planning Department,
Development Monitoring System Report (January 19, 2000)
Table III - 7
Water Supply/Demand Outlook
Total Existing Supply Reported by Purveyors
Total Existing Demand Reported by Purveyors -1999 (1)
Development Monitoring System (2)
Pending Projects 9,348
Approved Projects 9,622
Recorded Projects 3,690
Projected Purveyor Water Demand
Long Term Agricultural and Miscellaneous Uses
Total Exisitng and Projected Water Demand
Net Available Supply (Surplus)
(1) From Table III - 5
(2) Los Angeles County Regional Planning Department,
Development Monitoring System Report (January 19, 2000)
Table IV • 1
57,250
22,660
7,100
87,010
156,900 - 142,800
Section IX
Appendices
UPPER SANTA CLARA VALLEY WATER CONIl1=E
22722 W. Soledad Canyon Road • P.O. Box 903 • Santa Clarita, CA 91380.9003 • (805) 259.27 37
November 4, 1998
Michael D. Antonovich, Supervisor
Los Angeles County, 5th District
500 West Temple Street
Los Angeles, CA 90012
Jan Heidt, Mayor
City of Santa Clarita
23920 Valencia Blvd., Suite 300
Santa Clarita, CA 91355
bear Supervisor Antonovich and Mayor Heidt:
This letter is written on behalf of the members of the Upper Santa Clara Water
Committee. Collectively, we are responsible for ensuring that the citizens
of the Santa Clarita Valley have a safe, adequate, and reliable water supply.
To that end, we wanted to provide you with an update on the valley's existing
water supply and our plans to provide water supply updates in the future.
The Santa Clarita Valley is served by four retail water suppliers: Santa
Clarita Water Company, Valencia Water Company, Newhall County Water District
and Los Angeles County Waterworks District 36. The Castaic Lake Water Agency
(CLWA) is a wholesaler that provides water from California's State Water
Project to the retailers for distribution. These five entities meet regularly
as the Upper Santa Clara Water Committee to beneficially coordinate the use
of water in this area.
At the present time, sufficient water supplies exist to adequately and
reliably serve existing and planned near term developments tracked by
Los Angeles County's Development Monitoring Program (DMS). For long term
planning purposes, the .average available water supply within the Santa
Clarita Valley is approximately 107,000 acre -ft per year. Water supplies
include groundwater from the Alluvial and Saugus Aquifers and imported water
from the State Water Project. The local Aquifers are in good operating
condition producing water quality that meets or exceeds standards set by the
California Department of Health Services and the Environmental Protection
Agency.
It's important to note that as development occurs in the valley, the local
water entities add water supply and facilities on an incremental basis and
in advance of the need. It is not reasonable for service providers to build
all that is necessary to accommodate projected water demands twenty to thirty
years in the future. For example, CLWA is currently constructing the first
phase of a recycled water project that ultimately is planned to deliver
approximately 10,000 acre -ft of highly treated wastewater for non -potable
uses. Once under way, this project will add to the areas total water
supply and serve to help "drought proof" existing supplies from future
droughts.
IMABERS
SS Angeles County Waterworks District No. 36 6 Newhall County Water District • Santa Clarita Water Company • Valencia Water Company • Castaic Lake Water.A�t
-2 -
The total municipal water demand, as reported by the four local water retailers
was approximately 55,000 acre -ft for 1997. Therefore, we conclude that at the
present time, a considerable surplus over demand of 52,000 acre -ft exists within
the Santa Clarita Valley.
Water supply information is collected and reported by the local water community
to the County's' Regional Planning Department on a regular basis as required by
DMS. However, we believe that close coordination between the water suppliers
and local government planning agencies is essential to provide decision makers
with the most accurate and up to date information possible. Therefore, we are
developing an annual water report for the Santa Clarita Valley to be released
in January of each year. The purpose of the report is to provide factual
information about the area's local water supply and existing water demand.
This annual report would be a public document provided to Los Angeles County
and the City of Santa Clarita who may use the information in their local land
use decision making processes. A copy of the report's proposed Table of
Contents is attached to this letter.
The members of the Upper Santa Clara Water Committee look forward to working
with the County and the City to provide accurate and timely information about
water availability within the Santa Clarita Valley.'
Very truly yours,
W. J. Man J,vt
Santa Clarita Water Company and
Chairman, Upper Santa Clara Water Committee
Robert J.;DiPrimio
Valencia Water Company
Thomas Shollenbeiger j
Newhall County Water District
WJM/naf
Enclosure
obert C. Sagehorn
Castaic Lake Water Agency
A", Et� ,,
Dean Efst thiou
L.A. County Waterworks Distr. No. 36
city of
Santa Clarita
23920 Valencia Blvd.
Suite 300
Santa Clarita
California 91355-2196
December 10, 1998
Phone
(805) 259-2489
Fax
(805)259-8125
Upper Santa Clara Valley Water Committee
22722 W. Soledad Canyon Road
Santa Clarita, CA 91380-9003
Subject: Santa Clarita Water Supply Report — Letter Dated November 4, 1998
Dear Chairman Manetta and Committee Members:
Thank you for your letter outlining your assessment of current water supplies
for the Santa Clarita Valley. It is essential that the City of Santa Clarita be
kept informed as to the status of the balance of available water supplies and
the increasing demand for those resources. As previously discussed, this kind
of information is essential to the City's planning efforts. In order to properly
evaluate any proposed new development, it is necessary to be able to know
that adequate utilities, along with other support items, are available to meet
the increased demands without adversely impacting existing services.
We are pleased to see that you are establishing a format to provide this water
availability information on an annual basis. This proposed "Santa Clarita
Valley Water Report" will help the Council, staff, and residents better
understand the ongoing process that is necessary to successfully provide for
our water needs. We look forward to receiving your first report and continued
positive dialog between the City and the members of the Upper Santa Clara
Valley Water Committee.
Sincerely,
Anne arcy
Mayor
JAD:LPC:Ikl
eng-subdkd92862.doc
cc: City Councilmembers
Anthony J. Nisich, Director of Transportation & Engineering Services
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