HomeMy WebLinkAbout2000-02-08 - AGENDA REPORTS - SCV WATER RESOURCES (2)CITY OF SANTA CLARITA
AGENDA REPORT
NEW BUSINESS 111
City Manager Approval:%
Item to be presented by: Jeffrey Lambert
DATE: February 8, 2000
SUBJECT: SANTA CLARITA VALLEY WATER RESOURCES
DEPARTMENT: Planning & Building Services
RECOMMENDED ACTION
Receive the report and direct staff to work with the Castaic Lake Water Agency, members
of the public, and the water retailers to address the issues raised by the environmental
community with the Santa Clarita Valley Water Report 1998.
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 1998, prepared by the Upper Santa Clarita Valley Water Committee January 1999,
is submitted for informational purposes. The 1998 report is the most current water report
available that is prepared by the Upper Santa Clarita Valley Water Committee.
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 prepares an annual report on the reliability of
water supplies to serve existing and planned near-term development in the Valley that is
tracked by the Los Angeles County's Development Monitoring System (DMS). The most
recent report available is the 1998 report as dated January 1999. However, the
USCVWC anticipates that the 1999 Santa Clarita Valley Water Report will be
released in mid to late February. Some of the information presented here will likely be
updated with this latest report.
Concerns expressed regarding the data and assumptions used in the report and their
implications on the assessment of the Valley's water availability and reliability are
illustrated below. Each concern is categorized by either the demand for or supply of water
and a response is provided based upon research conducted by City staff. The City staff has
not had the opportunity to review the contents of this report with the water agencies;
however, should the Council provide direction as recommended above, this consultation will
occur shortly.
Continued To: �, dftem:14_�&
Demand Concern 1: Use of a wet year, rather than an average or dry year, when
illustrating demand for water is misleading because it underestimates true average
demand.
Testimony before the Public Utilities Commission indicates that actual household water
consumption decreases in draught years for two reasons: 1) people voluntarily conserve
when a draught is declared, and 2) usage decreases from mandatory rationing when a
draught is declared. In addition, conservation is encouraged through public education
and increasing the cost for water (penalties applied to the user for using more than
his/her allocated share) which both decrease demand. However, in dry years that follow
wet years, demand remains fairly constant as during wet years because people do not
shift towards conserving behavior until asked to do so. Staff is in the process of
collecting data that tests these assumptions, which will be presented during the report's
presentation on February 8.
Demand Concern 2: Total usage does not include private well useldraws on the
Alluvial Aquifer and Saugus Formation. Since individual wells and private
developments are not included with the reported purveyor's use, the Valley's estimated
total demand is understated.
The Santa Clarita Valley Water Report 1998 does not include private well use in the
total demand figures used, so the impact on demand from private use is not calculated
at this time. However, the report does provide demand -use for the LA County Honor
Farm, Newhall Land & Farming Company, and Valencia County Club for a total of
3,361 acre feet per year. This figure is included in the second supply concern section
which addresses reliability against total demand. In addition, the 1998 Santa Clarita
Valley Water Report does indicate that well levels from the Alluvial Aquifer are at or
above previously measured historic high water levels, which indicates a full aquifer
even though pumping has been above the perennial yield since 1994. The perennial
yield of the Saugus Formation is not able to be calculated at this time due to limited
information on the characteristics of the aquifer.
Demand Concern 3: The figure used in the report to quantify average annual single
family residential usage (0.6 acre feet per year) is too low and understates demand. The
figure that should be used for residential use is 1.0 acre feet per year.
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 Callegas' (Ventura County) single home figure is 0.52 and the multi -family dwelling
per unit figure is 0.42. City staff will continue to collect data from local water retailers
and other applicable agencies to provide additional comparisons regarding these figures.
Supply Concern 1: Overestimation of water reliability, particularly in years of
draught. Storage is not sufficient to hold water collected in wet and average years;
thus, the local alluvial water extraction exceeds safe/perennial use and an
unsustainable overdraft occurs.
Water reliability is a factor of rainwater. However, the water retailers have taken and
plan to take precautions to minimize the impact of a sustained draught, including:
implementing a water conservation program, purchasing additional State Water Project
(SWP) entitlements, participating in the Monterey Agreement that allocates water
among SWP contractors during water shortages, ensuring collection and storage locally
in the Saugus Aquifer (a confined aquifer), and water recycling. It is anticipated that
annual water reports will update the City and the community on the status of the water
agencies' activities to improve the long-term water supply for the valley.
Supply Concern 2: Overestimation of actual water delivery from the State Water
Project due to the use of the entitlement amount to estimate actual supply enables over-
building for actual supply.
The 1998 Santa Clarita Valley Water Report identified the total existing retail and
projected future demand (as identified by Los Angeles County's DMS) as 69,148 acre
feet per year. The report also identified other demand (including Newhall Land &
Farming Company, LA County Honor Farm, and the Valencia Country Club) as 3,361
acre feet per year. The valley's total 1998 water supply of 106,700 acre-feet per year
exceeds total estimated demand by about 34,000 acre-feet per year.
Source of Water Supply
(A)
1998 Supply
(B)
1998 Supply
@ SWP 50%
(C)
1999 Est.
SWP Supply
@ 50%
Alluvial Aquifer
32,500 AFY
32,500 AFY
32,500 AFY
Saugus Formation
20,000 AFY
20,000 AFY
20,000 AFY
State Water Project (SWP)
54,200 AFY
27,100 AFY
47,100 AFY
TOTAL Water Supply
106,700 AFY
79,600 AFY
99,600 AFY
Purveyor Demand
48,858 AFY
48,858 AFY
48,858 AFY
Development Monitoring System
20,390 AFY
20,390 AFY
20,390 AFY
Subtotal Purveyor's Demand
69,148 AFY
69,148 AFY
69,148 AFY
Other Water Demand
3,361 AFY
3,361 AFY
3,361 AFY
TOTAL Water Demand
72,509 AFY
72,509 AFY
72,509 AFY
Est. Water Surplus/(Deficiency)
34,191 AFY
1 7,091 AFY
27,091 AFY
In the chart above, column A assumes that the imported water from the SWP
entitlement is 100% reliable. Column B discounts the SWP entitlement by 50% to
illustrate how existing supply is still sufficient to meet total demand based on 50%
reliability of the imported water. Column C includes the 40,000 acre feet of water
entitlement which was recently purchased from the SWP in 1999 (for a total annual
entitlement of 94,200 acre feet) and then discounts the revised SWP entitlement by
50%. In all three scenarios, reliability to meet total valley demand is demonstrated.
Based on the concerns expressed and the responses provided to these concerns, staff
concludes that some concerns may have been drawn out of context. However, 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 receive the 1999 Santa Clarita Valley Water Report upon its
completion in mid to late February and utilize the updated report to address the issues
raised by the environmental community with the 1998 Santa Clarita Valley Water
Report. In addition, Council may direct staff to report on any significant differences in
data or conclusions drawn from the information provided in the updated report.
2. Other action as determined by Council.
FISCAL IMPACT
The report has no fiscal impact.
ATTACHMENTS
A. Santa Clarita Valley Water Report 1998, available in the City Clerk's reading file
Santa Clarita Valley Water Report
1998
CASTA1C
L A K L
I ATER'
AGENCY
PUSUC WORKS
4
SC&
Castaic Lake Water Agency
Los Angeles County Waterworks District #36
Newhall County Water District
Santa Clarita Water Company
Valencia Water Company
Prepared By: The upper Santa Clara Valley Water Committee
Date: January, 1999
I.
Executive Summary
Santa Clarita Valley Water Report
1998
This annual report provides factual information about the current water resources
within the Santa Clarita Valley. 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, prepared this report.
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.
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.
In 1998, the Committee reports a total water supply of approximately 107,000
acre-feet per year and an existing water demand of 48,858 acre-feet. The Santa
Clarita Valley currently has a surplus of supply of about 58,142 acre-feet over
existing 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 and imported water from the State Water
Project. The following summarizes the water resources of the Valley in 1998:
Alluvial Aquifer
• The annual perennial yield for the Alluvial Aquifer is 32,500 acre-feet per
year. This quantity of water represents an amount of water that can be
pumped annually from the aquifer on a long-term basis and during dry year
conditions without causing an undesirable result.
• In 1998, average groundwater levels measured in the Alluvial Aquifer at 5
representative wells were at or above previously measured historic high water
levels indicating a full aquifer. The aquifer remains full even though annual
pumping has been above the perennial yield since 1994. Operating results
indicate the aquifer is in good operating condition and can produce more
water than the annual perennial yield of 32,500 acre-feet during average or
wet years without consequence.
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, the
annual recharge potential of 20,000 acre-feet per year has been established
for the Formation.
•
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 40,000 acre-feet or more of groundwater
per year. This increased level of pumping could be limited to dry years,
presumably when shortages of imported water supplies could occur.
Imported Water
• CLWA has an entitlement to 54,200 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. 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,
groundwater storage programs both inside and outside the Santa Clarita
Valley, and participation in the state's Drought Water Bank and short term
water exchanges from other agencies on an as needed basis. These
ii
measures, implemented over time, provide assurance that alternate supplies
will be available to meet local water demands when SWP deliveries are
reduced.
• In 1999, CLWA is planning to increase their imported "water supply by
acquiring an additional 40,000 acre-feet of SWP entitlement from willing
sellers in Kern County. This acquisition will increase CLWA's reliability of
existing supplies while adding new water to meet planned future water
demands.
Water Demands
• In 1998, the total water demand reported by the four retail water purveyors is
48,858 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, it reports that the projected water demand
from all projects being tracked is 20,290 acre-feet per year.
• Total future water demand as measured under the DMS system is 69,148
acre-feet.
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 reliability policy 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.
iii
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.
Summary of Water Supply and Demand
For long term planning purposes, a summary of the Valley's water resources
is (i) a current water supply of 107,000 acre-feet per year, (ii) existing retail
purveyor demand of 48,858 acre-feet in 1998, (iii) projected water demand of
20,290 acre-feet and (iv) a current surplus of supply of about 38,000 acre-feet
over existing and near term projected demand.
iv
Table of Contents
Santa Clarita Valley Water Report
Calendar Year 1998
ExecutiveSummary ....................................................................................................... i
Listof Tables....................................................................................................... vii
Listof Figures .....................................................:................................................ viiii
I. Introduction........................................................................................................ 1
A. Background................................................................................................1
B. Purpose and Scope of the Report .............................................................. 2
C. Description of the Upper Santa Clara River .............................................. 2
Hydrologic Area and Eastern Sub -Area
11. Water Supplies.................................................................................................... 4
A. Eastern Groundwater Basin..................................................................... 4
1. Alluvial Aquifer............................................................
.......................... 4
2. Saugus Formation................................................................................ 7
B. Imported Water.......................................................................................... 9
1. Water Supply Entitlement................................................................... 10
2. Water Supply Reliability...................................................................... 10
C. Water Quality........................................................................................... 12
1. Groundwater................................................................................. 12
2. Imported Water.............................................................................. 13
D. Other Water Supplies.............................................................................. 13
1. Water Recycling........................................................................... 13
E. Precipitation.............................................................................................14
1. Precipitation Records......................................................... I.......... 14
III. Water Demands -Existing and Projected......................................................... 15
A. 1998 Water Demand..................................................................................... 15
v
B. Projected Water Demand.............................................................................. 15
IV. Water Conservation..........................................................................................16
A. Current Practices.......................................................................................... 16
V. Summary of Water Supply and Demand ....................................................... 22
A. Results for 1998........................................................... ............................... 22
B. Water Supply Outlook................................................................................... 22
VI. References......................................................................................................24
VII. Appendix A...................................................................................................... 25
Vi
TABLES
Tables Following Paoe #
II -1 Newhall County Water District................................................................. 14
1998 Groundwater Quality
11-2 Santa Clarita Water company.................................................................. 14
1998 Groundwater Quality
11-3 Valencia Water Company....................................................................... 14
1998 Groundwater Quality
11-4 Castaic Lake Water Agency................................................................... 14
1998 Imported Water Quality
II -5 Santa Clarita Valley Rainfall.................................................................... 14
1988-1998
III -1 Water Production, Los Angeles County ................................................... 15
Waterworks District 36
III -2 Water Production
Newhall County Water District................................................................. 15
111-3 Water Production
Santa Clarita Water Company................................................................ 15
III -4 Water Production.....................................................................................15
Valencia Water Company
III -5 Water Production.....................................................................................15
Water Purveyors — Total
III -6 Water Production.................................................................................... 15
Other
III -7 Water Production.....................................................................................15
Total
III -8 Existing and Projected Water Demand .................................................... 15
V-1 Water Supply/Demand Outlook............................................................... 23
Vii
FIGURES
1-1 Purveyor Water Service Areas................................................................... 3
1-2 Upper Santa Clara River Basin.................................................................. 3
II -1 Groundwater Basins within Eastern HAS ................................................. 14
11-2 Representative Wells............................................................................... 14
II -3 Representative Alluvial Wells................................................................... 14
11-4 Representative Saugus Wells.................................................................. 14
11-5 Santa Clarita Valley Rainfall 1988-1998 ..................................................14
Section I
Introduction
Section LA 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
Procedures and implementing valley wide conservation programs. In 1985, the
Committee prepared the area's first Urban Water Management Plan in conformance
1
with the guidelines and requirements of A6797. 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.
Section LC 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 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
2
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 If
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 hydrogeologic 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 hydrogeologic conditions of the Alluvial Aquifer
underlying the Santa Clarita Valley and its potential for artificial recharge. In 1988,
Slade conducted a hydrogeologic evaluation of the Saugus Formation, its quantity, and
potential for development. Figure 11-2 shows the location of representative production
wells operated by the local purveyors from the Alluvial Aquifer and Saugus Formation.
Section II.A.1 Alluvial Aquifer
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
4
deepest along the center of the present river channel, with a 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.
Depth to water in the Alluvium has varied over the period of record, reflecting seasonal
and long-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, water levels 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. Other areas
along the river exhibit rising water to the surface, however, the greater depth to water is
typically found east of Bouquet Junction.
Groundwater generally moves toward the outlet of the Sub -Area, which is also the outlet
of the Upper Santa Clara River HA. Thus, movement in the Alluvium of the tributaries is
toward their confluence with the Santa Clara River and then westward in the Alluvium
following the Santa Clara River, The San Gabriel fault and Holser fault traverse the
Sub -Area. The San Gabriel fault creates a partial barrier to groundwater flow in the
Alluvium near Bouquet Junction, where water levels are offset. The Holser fault does
not appear to affect groundwater levels and is not a definitive barrier to ground water
flow.
The Alluvium is the most permeable of the local aquifer units. Studies have reported
estimated transmissivity values of 50,000 to 500,000 gallons per day per foot, with the
higher values where the alluvium deepens 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
5
16,410 acres, variable thickness, and specific yield of 9 to 16 percent, it's estimated that
the theoretical maximum amount of groundwater that could be held and retrieved in
usable storage is 240,000 acre-feet. Calculated storage volumes based on well data
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 hydro -geologic condition,
perennial yield, storage capacity and potential for artificial recharge. 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 operating experience of its
members, the Committee has adopted an annual perennial yield of 32,500 acre -ft. This
quantity of water represents an amount of water that can be pumped annually from the
aquifer on a long-termbasis and during dry year conditions without causing an
undesirable result. Undesirable results would include permanently lowered
groundwater levels, subsidence or degradation of water quality in the aquifer.
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. During times of average and wet precipitation, the amount of water
pumped from the Alluvial Aquifer can exceed the perennial yield without consequence.
However, during prolonged dry periods, exceeding the perennial yield .may stress the
aquifer by temporarily lowering water levels. 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.
9
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 reclaimed water when available.
In 1998, the local purveyors operated 35 Alluvial wells. Figure II -3 provides information
about average 1998 water levels recorded from five representative wells in the Alluvial
Aquifer. Figure II -3 shows the following for each well: the relative location, ground
surface elevation, the average 1998 standing water level depth, and the approximate
limits of the well casing perforations. This figure also shows the historic high and low
water levels as well as the base elevation of the Alluvial Aquifer as reported by Slade.
The historic high water levels were measured in the 1945 water year whereas the
historic low water levels were measured in 1965.
It's interesting to note that at three of the representative wells (#1, #2, & #4), the 1998
water levels are higher than the previously measured historic high water levels
indicating a full groundwater aquifer. Also, total groundwater extractions have been
above the aquifer's annual perennial yield since 1994 (see Table III -7). This data
supports the Committees conclusion that the Alluvial Aquifer can produce more water
during average or wet years than the annual perennial yield of 32,500 acre feet without
consequence. Operating results indicate the aquifer is in good operating condition and
produces water that meets strict State and Federal water quality standards. A
summary of Alluvial Aquifer production for 1998 is reported in Section III of this report.
Section II.A.2 Saugus Formation
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
7
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 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 amount of
usable groundwater in storage is 1.4 million acre-feet, which is about 7 times more than
the amount found in the Alluvial Aquifer. This is a conservative estimate since it was
based on water held in storage only in the sand and gravel layers of the Saugus
Formation.
A determination of the annual perennial yield 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 can
not be made. However a preliminary estimate of the potential annual recharge ranges
between 11,000 to 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.
As stated above, the Saugus Formation has a large estimated storage capacity of 1.4
Million acre-feet of usable groundwater contained in depths from 500 feet to 2,500 feet.
8
It is believed that the aquifer is capable of producing 40,000 acre-feet or more of
groundwater per year. This increased level of pumping could be limited to dry years
presumably when shortages to CLWA's imported water supplies would occur.
Maintaining this substantial volume of water in the Saugus Formation is an important
strategy to help "drought proof' water supplies in the Santa Clarita Valley.
In 1998, the local purveyors operated 11 Saugus wells. Figure II -4 provides information
about average 1998 water levels recorded from six representative wells in the Saugus
Formation. Figure 11-4 shows the following for each well: the relative location, ground
surface elevation, the average 1998 standing water level depth, and the approximate
limits of the well casing perforations. Data showing the historic high and low
groundwater levels were not available for this report. However, it is believed that the
1998 average standing water levels represent a full groundwater formation. A summary
of Saugus Formation production for 1998 is reported in Section III of this report.
Section 11.13 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 California Aqueduct. SWP water is temporarily
stored in San Luis Reservoir, which is jointly operated by the DWR and the U.S. Bureau
of Reclamation. Prior to delivery to Castaic Lake Water Agency, SWP supplies are
stored in Castaic Lake located at the end of the West Branch of the California Aqueduct..
CLWA'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
0
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 for 1998 is
reported in Section III of this report.
Section II.13.1 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 54,200 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.
Section II.B.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 54,200
acre -ft per year of SWP water. Current reliability estimates prepared by the Department
of Water Resources indicate average deliveries to CLWA of 41,000 acre-ft/year based
on use of 1922-1993 hydrology and current SWP facilities. In dry periods, which occur
about once in every 20 years, the CLWA yield of the SWP supplies is 18,000 acre-feet
per year. In extreme dry years that occur about once in 50 years, CLWA's SWP supply
can be as low as 10,000 acre-feet per year assuming a repeat of 1977 hydrologic
conditions. Since SWP supplies are reduced in dry periods, CLWA has implemented
Programs to improve its supply reliability in dry periods.
10
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
i
of water, CLWA can obtain water from SWP up to their full entitlement. However,
i during dry years, there will not be enough water to provide CLWA and other SWP
contractors with their full water delivery requests.
p 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 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 release of
the draft programmatic environmental impact statement/environmental impact report in
1999. 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.
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
11
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.
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 11-3 lists 1998'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
perch lorate(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 removes
12
{ perchlorate from water. Also, the Committee has met on several 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 II -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
t 290 mg/L.
Section 11.13 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
13
c
i
encourages and supports the use of recycled water to help augment and "drought proof'
existing supplies. Overall, the program is expected 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 ME Precipitation
Section ILEA Precipitation Records
The Santa Clarita Valley is characterized as having an and climate. Typically, "dry
years" (<10" per year) are followed by "wet years" (>20" per year) in a cyclical pattern.
The ten-year average annual precipitation (1988-1998) for the valley is 24.4 inches.
Figure II -5 shows monthly precipitation values in inches as well as the annual totals
recorded in the Santa Clarita Valley by the Newhall County Water District. In addition,
Table II -5 presents the data in tabular form. Between 1988 and 1998, there have been
several years with >35 inches of precipitation.
14
0 q-- WZ;'
— H S
p YZ uj 03 3 Z
4 Y > > Z W
000 " o
o
0
0
tG
e
CJ
y
s3�
— N—
SCALE: 1"=72,000'
�fl
LEGEND
(@ ALLUVIAL WELLS
OO SAUGUS WELLS
1❑ - SM-SISM WELL
0 _ NCWD p
F21- SCWC-STADIUM WELL2
: NCWD /10
El - VWC-02 WELL
3 - SCWC /1
4E - VWC-N-4 WELL
Q - VWC /201
El - NL&F B-6 WELL
Q - VWC 4160
ANGELES
AL - NL&F 0156
NATIONAL
.->m
rAIC ++ NDM'
+
a
M
+ +'
+
+ +
+ «
+ ` GUS FORT
`+ BOUNDARY
+'+
t w 3 «
a' a + + /
++ + + BOUQUET
+ + + + + 4 JUNCTION
+ « + + r
+ • - t + + + 2 + i
+ « a + a ^" + i+ +
6 + « , +
5 ` « + 'Y t + a
«
« + SAUGUS
+
I2MALL
UPPER SANTA CLARA
VALLEY WATER COMMITTEE
SFF"`�'ory�q �biy
AND IG
4
FIGURE II -2
REPRESENTATIVE
WELLS
elelal�'�,�i�
9
PRE
kj,'
wit
f
WO - -
- -
O
AiNno D
s3i3 0
g
$
$
T1
J
y
a$o
$
.—
oD
I
1
I
1
W Cn3
� NO
S2j a $ LL Waa
KN
i
z S
s
_
'" 8
W
w _ I
$
a
law
0
it
bb
I
l i
I
l
i
W
o y
[y[FF
j
-zilLW3�
WfY
) Sk�
iDe I;
i,
a
(L
Rmafilnoe
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ve
I
.
,
I
I
I
i
i
I
�,J! O O O O
a0 a U) co N
i
i
1
I
Parameter
Table II -1
NEWHALL COUNTY WATER DISTRICT
1998 GROUNDWATER QUALITY
Units MCL Range Ave Range Ave Range Ave
urbrtlity
U
.5
0.04-0.41
.11
<DLR
<DLR
<DLR
.1
-1.
3
1 1
0.07
<DLR
<OlR
<DLR
<DLR
<DLR
Total i orm Gena (A)
(+) mp/Mo.
c5%
0 - %
0.
0-2.5%
0.
- .5%
.00
Fecal Coliform Bacteria (PA)
Acur violations
0
0
0
0
0
0
0
15ftiff,TkRiF CHEMICALS
mg1L
mg/L
0.001
<DLR
<DLR
<DLR
<DLR
-<DLR
<OLR
otal Trihalomethanes -
mg/L
0.1
0.003.0.81
0.025
0.007:0.091
0.046 I
u.u24 - 0.086
0.065
Endrin
m91L
0.0002
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Undane
mg/L
0.0002
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Methoxychlor
Toxaphene
mg/L
mg1L
0.04
0.03
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR.
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Z, -D
mg/L
0.07
<DLR
<DLR
<DlR
<DLR
<DLR
<DLR
2,4,5 -TP (Silvex)
mg/L
0.05
7[ -)-LR
<DLR
<DLR
<DLR
<DLR
<DLR
Atrazine
mg/L
0.003
<DLR
<DLR
<DLR
<DLR
<DLR
<13LR
Bentazon
mgIL
0.018
<DLR
<DLR
<DLR
<DLR
<DLR
'<DLR
<DLR
Benzene
m91L
0.001
<DLR
<DLR
<OLR
<DLR
<DLR
<DLR
Carbon Tetrachloride
mg/L
0.0005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
1,2-Dibromo-3chloropropane (DBCP)
mg/L
0.0002
<DLR
<DLR
<DLR
<OLR
<DLR
<DLR
1,4 -Dichlorobenzene
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
DLR
<DLR
12-Dichlorcethane (1,2 -DCA) ..
M91L
0.0005
<DLR
gni o
<DLR
.ro o
<DLR
mr R
<DLR
<nl R
<OLR
<DLR
<DLR
<DLR
1,1-Dichlorcethylene 1 1119,� -- -
mn/L 0.0005 <DLR <DLR <OLR <DLR <DLR <DLR
i,r�iu nmvy,vyc„c
Efhylbenzene
Ethylene Dibromide (EDB)
Molinate
--� -
mg/L
mg(L
mg/L
0.7
0.00002
0.02
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
-<DLR
<DLR
<DLR
<DLR
0.07
<DLR
<OlR
<DLR
<DLR
<DLR
Monochiorbenzene
mg/L
0.004
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Simazine
mg1L
mg/L
0.001
<DLR
<DLR
<DLR
<DLR
-<DLR
<OLR
1,1,2,2 -Tetrachloroethane
Tetrachloroethylene (PCE)
mglL
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
mg/L
0.07
<DLR
<DLR
<OLR
<DLR
<DLR
<DLR
Thiobencarb
m91L
0.2
<DLR
<DLR
<DLR
<OLR
<DLR
<DLR
1,1,1 -Trichloroethane (1,1,1 -TCA)
1,1,2 -Trichloroethane (1,1,2 -TCA)
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Trichloroethylene (TCE)
m91L
0.005
<DLR
<DI.R
<DLR
<DLR
<DLR
<DLR
m9/L
0.0005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Vinyl Chloride
mg/L
1.75
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Xylenes
cis-12-51Uiloroethylene (c -1,2 -OCE)
mg/L
0.006
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
trans-l2-Dichlorethylene (t-1.2-DCE)
mg/L
0.01
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
thane (1,1CA)
1,1-Dichiorce-D
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
12-Dichloropropane
mg/L
0.15
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Trichlorofluoromethane
1,1,2-Tdchloro-12,2-Trifluorcethane
mg/L
1.2
<OLR
<DlR
<DLR
<DLR
<DLR
<DLR
mg/L
0.018
<DLR
<DLR I
<DLR
<DLR
<DLR
<DLR
Carbofuran
mg/L
0.7
<DLR
<DLR
<OLR
<DLR
<DLR
<DLR
Glyphosate
I <n R I
<nl R
<DLR i
<DLR
1 <DLP
Parameter
Table 11.1 (cont)
NEWHALL COUNTY WATER DISTRICT
1998 GROUNDWATER QUALITY
Units MCL Range Ave Range Ave Range Ave
Aluminum
1
<DLR
<DLR
<DLR
<DLR
<
Arsenic
mg/L
0.05
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Barium
mg/L .
1
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Cadmium
mg/L
0.005
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Chromium
mg/L
0.05
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Fluoride
mg/L
1.4-2.4
0.1-0.3
0.2
0.3-0.3
0.3
0.4-0.55
0.5
Lead
mg/L
0.05
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Mercury
mg/L
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Nitrate (as Nitrogen)
mg/L
1.2 - 4.8
2.8
1.2-1.6
1.5
<DLR - 0.9
<DLR
Selenium
mg/L
110
<DLR
<DLR
<DLR
<DLR
<DLR
SLR
Silver
mg/L
<DLR
<DLR
cDLR
<DLR
<DLR
<DLR
RADI A IVITY
Gross Alpha Activity
ilL
15.00
NR
NR
NR
NIR
2.2-3.0
2.7
Gross Beta Activity
pCi/L
50
NR
NR
NR
NR
1.7.7.3
3.9
Tritium
PCi/L
20,000
NR
NR
NR
NR
NR
NR
Strontium 90
pCi/L.
8
NR
NR
NR
NR
NR
NR
Radium 226 & 228 combined
pCVL
5
NR
NR
NR
NR
NR
NR
Uranium
PCVL
20
NR
NR
NR
NR
NR
NR
Color
15
<5 - <5
<5
<5-<5
<5
c5 - <5
<5
Odor -Threshold
3
1-2
t
1-1
1
1.1
1
Chloride
En;is
500
35.5-59.1
44.6
44.1-90.5
62.6
42.9-65
58.1
Copper
1
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Foaming Agents (MBAS)
0.5
<DLR - 0.08
<DU
<DLR - 0.07
<DLR
<DLR
<DLR
Iron
mg/L
0.3
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Manganese
mg/L
0.05
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Sulfate
mg/L
500
146 - 235
187.7
76.1-85.7
82.5
138-389
217.8
Zinc
mg/L
5
<DLR
<DLR
<DLR
<DLR
<DLR
<DLR
Total Dissolved Solids
mg/L
1,000
440.600
535
444-616
504
514-728
578
Specific Conductance
umhos
1,600
748-928
852
692-932
796.7
790-1012
861
ADDITIONAL CONSTITUENTS ANALYZED
pH
Units
7.2-7.6
7.4
6.9.7.5
7.4
7.3-8.3
7.6
Hardness (CaCO3)
mg/L
249 - 393
308
246-307
273
253-410
299
Sodium
mg/L
53.6 - 89.5
70.2
55-109
82.3
73.81
77.5
Calcium
mgt
74.2-113
91
69.9-90
78
65-102
74.6
Potassium
mg/L
2.2-2.7
2.4
3.1-3.1
3.1
3.5-3.9
3.8
Magnesium
mg/L
15.5.26.5
19.5
17.4-2-
18.9
22-38
27.3
LEAD AND COPPER TAP SAMPLING
Copper 90th Peroenfile 1mgll1
1.3
1
0.3451
0.661
6256
Lead 90th Percentile
mg/L
1 0.015
1
10.005010.0060
0.0050
Table 11- 2
SANTA CLARITA WATER COMPANY
1998 GROUNDWATER QUALITY
Pammotor Units MCL Range Average
p�4►D,'e7�tD
CLARITY
Turbidity
NTU
0.5
0.04 -0.17 1
0.06
MICROBIOLOGICAL
Total Coliform Bacteria (PA)
(+) Smp/Mo.
<5%
0-1%
0.00
Fecal Coliform Bacteria(PA)
Acute violations
0
0
0
ORGANIC CHEMICALS
Total Trihalomethanes
mg/L
0.1
0.041 - 0.1051
0.067
Endrin
mg/L
0.0002
<DLR
<DLR
Lindane
mg/L
0.0002
<DLR
<DLR
Methoxychlor
mg/L
0.04
<DLR
<DLR
Toxaphene
mg/L
0.03
<DLR
<DLR
2,4-D
mg/L
0.07
<DLR
<DLR
2,4,5 -TP (Silvex)
mg/L
0.05
<DLR
<DLR
Atrazine
mg/L
0.003
<DLR
<DLR
Bentazon
mg/L
0.018
<DLR
<DLR
Benzene
mg/L
0.001
<DLR
<DLR
Carbon Tetrachloride
mg/L
0.0005
<DLR
<DLR
1,2-Dibromo-3-chloropropane (L)SUP)
mg/L
0.0002
<DLR
<DLR
1,4 -Dichlorobenzene
mg/L
0.005
<DLR
<DLR
1,2-Dichloroethane (1,2 -DCA)
mg/L
0.0005
<DLR
<DLR
1,1-Dichloroethylene (1,1-DCE)
mg/L
0.007
<DLR
<DLR
1,3-Dichloropropene
mg/L
0.0005
<DLR
<DLR
Ethyibenzene
mg/L
0.7
<DLR
<DLR
Ethylene Dibromide (EDB)
mg/L
0.00002
<DLR
<DLR
Molinate
mg/L
0.02
<DLR
<DLR
Monochlorbenzene
mg/L
0.07
<DLR
<DLR
Simazine
mg/L
0.004
<DLR
<DLR
1,1,2,2 -Tetrachloroethane
mg/L
0.001
<DLR
<DLR
Tetrachloroethylene (PCE)
mg/L
0.005
<DLR
<DLR
Thiobencarb
mg/L
0.07
<DLR
<DLR
1,1,1 -Trichloroethane (1,1,1 -TCA)
mg/L
0.2
<DLR
<DLR
1,1,2 -Trichloroethane (1,1,2 -TCA)
mg/L
0.005
<DLR
<DLR
Trichloroethylene (TCE)
mg/L
0.005
<DLR
<DLR
Vinyl Chloride
mg/L
0.0005
<DLR
<DLR
Xylenes
mg/L
1.75
<DLR
<DLR
cis-1,2-Dichioroethylene (c-1,2-DCE)
mg/L
0.006
<DLR
<DLR
trans-1,2-Dichlorethylene (t-1,2-DCE)
mg/L
0.01
<DLR
<DLR
1, 1 -Dichloroethane (1,1 -DCA)
mg/L
0.005
<DLR
<DLR
1,2-Dichloropropane
mg/L
0.005
<DLR
<DLR
Trichlorofluoromethane
mg/L
0.15
<DLR
<DLR
1,1,2-Trichloro-1,2,2-Tri luoroethane
mg/L
1.2
<DLR
<DLR
Carbofuran
mg/L
0.018
<DLR
<DLR
Glyphosate
mg/L
0.7
<DLR
<DLR
Chlordane
mg/L
0.0001
<DLR
<DLR
Heptachlor
mg/L
0.00001
<DLR
<DLR
Heptachlor epoxide
mg/L
0.00001
<DLR
<DLR
Di(2-ethylhexyl)phthalate (DEHP)
mg/L
0.004
<DLR
<DLR
Table 11- 2 (cont)
SANTA CLARITA WATER COMPANY
1998 GROUNDWATER QUALITY
Parameter Units MCL Range Average
DJ¢RD
INORGANIC CHEMICALS
Aluminum
mg/L
1
<DLR
<DLR
Arsenic
mg/L
0.05
<DLR
<DLR
Barium
mg/L
1
<DLR
<DLR
Cadmium
mg/L
0.005
<DLR
<DLR
Chromium
mg/L
0.05
<DLR
<DLR
Fluoride
mg/L
1.4-2.4
0.3-0.4
0.3
Lead
mg/L
0.05
<DLR
<DLR
Mercury
mg/L
0.002
<DLR
<DLR
Nitrate (as Nitrogen)
mg/L
10
2.1-88
4.9
Selenium
mg/L
0.05
<DLR
<DLR
Silver
mg/L
0.1
<DLR
<DLR
RADIOACTNITY
Gross Alpha Activity
pCVL
15.00
<DLR - 7.4
2.6
Gross Beta Activity
pCVL
50
<DLR - 12.9
1.8
Tritium
pCVL
20,000
NA
NA
Strontium 90
pCVL
8
NA
NA
Radium 226 & 228 combined
pCVL
5
NA
NA
Uranium
pCVL
20
2.86-5.11
4.0
Color
Units
15
<5 - <5
<5
Odor -Threshold
Units
3
1 -1
1
Chloride
mg/L
500
34.4-99.6
63.1
Copper
mg/L
1
<DLR
<DLR
Foaming Agents (MBAS)
mg/L
0.5
<DLR - 0.14
0.02
Iron
mg/L
0.3
<DLR
<DLR
Manganese
mg/L
0.05
<DLR
<DLR
Sulfate
mg/L
500
72.9-230
138.3
Zinc
mg/L
5
<DLR
<DLR
Total Dissolved Solids
mg/L
1,000
390-824
580
Specific Conductance
umhos
1,600
672-1169
920
ADDITIONAL CONSTITUENTS ANALYZED
pH
Units
7.86-8.26
8.05
Hardness (CaCO3)
mg/L
223-466
355
Sodium
mg/L
47.8-107
Calcium
mg/L
47.5-118
90.2
Potassium
mg/L
2.1-5.2
3.6
Magnesium
mg/L
16.2-47.5
31.3
LEAD AND COPPER TAP SAMPLING
Copper 90th Percentile
mg/L
1.3
1
0.138
Lead 90th Percentile
mg/L
0.015
1
<0.005
Table If - 3
VALENCIA WATER COMPANY
1998 GROUNDWATER QUALITY
Parameter Units MCL Ranae Average
$Rf
CLARITY
Turbidity
NTU
0.5
0.04 - 3.48
0.13
MICROBIOLOGICAL
Total Coliform Bacteria (PA)
(+) Smp/Mo.
<5%
0-3
0.00
Fecal Coliform Bacteria (PA)
Acute violations
0
0
0
ORGANIC CHEMICALS
Total Trihalomethanes
mg/L
0.1
0.052 - 0.074
0.061
Endrin
mg/L
0.0002
ND
<DLR
Lindane
mg/L
0.0002
ND
<DLR
Methoxychlor
mg/L
0.04
ND
<DLR
Toxaphene
mg/L
0.03
ND
<DLR
2,4-D
mg/L
0.07
ND
<DLR
2,4,5 -TP (Silvex)
mg/L
0.05
ND
<DLR
Atrazine
mg/L
0.003
ND
<DLR
Bentazon
mg/L
0.018
ND
<DLR
Benzene
mg/L
0.001
ND
<DLR
Carbon Tetrachloride
mg/L
0.0005
ND
<DLR
1,2-Dibromo-3-chloropropane (DBCP)
mg/L
0.0002
ND
<DLR
1,4 -Dichlorobenzene
mg/L
0.005
ND
<DLR
1,2-Dichloroethane (9,2 -DCA)
mg/L
0.0005
ND
<DLR
1, 1 -Dichloroethylene (1,1-DCE)
mg/L
0.007
ND
<DLR
1,3-Dichloropropene
mg/L
0.0005
ND
<DLR
Ethylbenzene
mg/L
0.7
ND
<DLR
Ethylene Dibromide (EDB)
mg/L
0.00002
ND
<DLR
Molinate
mg/L
0.02
ND
<DLR
Monochlorbenzene
mg/L
0.07
ND
<DLR
Simazine
mg/L
0.004
ND
<DLR
1,1,2,2 -Tetrachloroethane
mg/L
0.001
ND
<DLR
Tetrachloroethylene (PCE)
mg/L
0.005
ND
<DLR
Thiobencarb
mg/L
0.07
ND
<DLR
1,1,1 -Trichloroethane (1,1,1 -TCA)
mg/L
0.2
ND
<DLR
1,1,2 -Trichloroethane (1,1,2 -TCA)
mg/L
0.005
ND
<DLR
Trichloroethylene (TCE)
mg/L
0.005
ND
<DLR
Vinyl Chloride
mg/L
0.0005
ND
<DLR
Xylenes
mg/L
1.75
ND
<DLR
cis-1,2-Dichloroethylene (c-1,2-DCE)
mg/L
0.006
ND
<DLR
trans-1,2-Dichlorethylene (t-1,2-DCE)
mg/L
0.01
ND
<DLR
1,1-Dichloroethane (1,1 -DCA)
mg/L
0.005
ND
<DLR
1,2-Dichloropropane
mg/L
0.005
ND
<DLR
Trichlorofluoromethane
mg/L
0.15
ND
<DLR
1,1,2-Trichloro-1,2,2-Trifluoroethane
mg/L
1.2
ND
<DLR
Carbofuran
mg/L
0.018
ND
<DLR
Glyphosate
mg/L
0.7
ND
<DLR
Chlordane
mg/L
0.0001
ND
<DLR
Heptachlor
mg/L
0.000011
<DLR
<DLR
Heptachlor epoxide
mg/L
0.00001
<DLR
<DLR
Di(2-ethylhexyl)phthalate (DEHP)
mg/L
0.004
<DLR
<DLR
Table 11- 3 (cont)
VALENCIA WATER COMPANY
1998 GROUNDWATER QUALITY
Parameter Units MCL Range Average
DSD.
INORGANIC CHEMICALS
Aluminum
mg/L
1
<DLR
<DLR
Arsenic
mg/L
0.05
<DLR
<DLR
Barium
mg/L
1
<DLR
<DLR
Cadmium
mg/L
0.005
<DLR
<DLR
Chromium
mg/L
0.05
<DLR
<DLR
Fluoride
mg/L
1.4-2.4
0.2-0.6
0.4
Lead
mg/L
0.05
<DLR
<DLR
Mercury
mg/L
0.002
<DLR
<DLR
Nitrate (as NO3)
mg/L
10
1.2-7
4.5
Selenium
mg/L
0.05
<DLR
<DLR
Silver
mg/L
0.1
<DLR
<DLR
RADIOACTIVITY
Gross Alpha Activity
pCVL
15.00
2.9-8.3
4.4
Gross Beta Activity
pCVL
50
NA
NA
Tritium
pCVL
20,000
NA
NA
Strontium 90
pCVL
8
NA
NA
Radium 226 & 228 combined
pCVL
5
0.2-4.9
1.6
Uranium
pCVL
20
1.6-6
4.2
Color
Units
15
<5 -15
<5
Odor -Threshold
Units
3
1 -1
1
Chloride
mg/L
500
26.5-112
72.1
Copper
mg/L
1
<DLR
<DLR
Foaming Agents (MBAS)
mg/L
0.5
<DLR
<DLR
Iron
mg/L
0.3
<DLR
<DLR
Manganese
mg/L0.05
<DLR
<DLR
Sulfate
mg/L
500
124 - 220
172
Zinc
mg/L
5
<DLR
<DLR
Total Dissolved Solids
mg/L
1,000
518 -892
637
Speck Conductance
umhos
1,600
829-1427
1019
ADDITIONAL CONSTITUENTS ANALYZED
pH
Units
7.27-7.98
7.56
Hardness (CaCO3)
mg/L
230-630
383
Sodium
mg/L
47-103
78
Calcium
mg/L
79-103
89
Potassium
mg/L
1 - 5
3
Magnesium
mg/L
22-35
27
LEAD AND COPPER TAP SAMPLING
Copper 90th Percentile
mg/L
1.3
0.154
Lead 90th Percentile
mg/L
0.015
0.0062
Table it - 4
CASTAIC LAKE WATER AGENCY
1998 IMPORTED WATER QUALITY
Parameter Units MCL Range Average
_. NO-.- PROBES
CLARITY
Turbidity
NTU
0.5
0.05 - 0.49
0.08
MICROBIOLOGICAL
Total Coliform Bacteria (PA)
(+) Smp/Mo.
<5%
0-1%
0.00
Fecal Coliforrn Bacteria (PA)
Acute violations
0
ORGANIC CHEMICALS
Total Trihalomethanes
mg/L
0.1
0.047 - 0.059
0.053
Endrin
mg/L
0.0002
<DLR
<DLR
Lindane
mg/L
0.0002
<DLR
<DLR
Methoxychlor
mg/L
0.04
<DLR
<DLR
Toxaphene
mg/L
0.03
<DLR
<DLR
2,4-D
mg/L
0.07
<DLR
<DLR
2,4,5 -TP (Silvex)
mg/L
0.05
<DLR
<DLR
Atrazine
mg/L
0.003
<DLR
<DLR
Bentazon
mg/L
0.018
<DLR
<DLR
Benzene
mg/L
0.001
<DLR
<DLR
Carbon Tetrachloride
mg/L
0.0005
<DLR
<DLR
1,2-Dibromo-3-chloropropane (DBCP)
mg/L
0.0002
<DLR
<DLR
1,4 -Dichlorobenzene
mg/L
0.005
<DLR
<DLR
1,2-Dichloroethane(1,2-DCA)
mg/L
0.0005
<DLR
<DLR
1, 1 -Dichloroethylene (1,1-DCE)
mg/L
0.007
<DLR
<DLR
1,3-Dichloropropene
mg/L
0.0005
<DLR
<DLR
Ethylbenzene
mg/L
0.7
<DLR
<DLR
Ethylene Dibromide (EDB)
mg/L
0.00002
<DLR
<DLR
Molinate
mg/L
0.02
<DLR
<DLR
Monochlorbenzene
mg/L
0.07
<DLR
<DLR
Simazine
mg/L
0.004 1
<DLR
<DLR
1,1,2,2 -Tetrachloroethane
mg/L
0.001
<DLR
<DLR
Tetrachloroethyiene (PCE)
mg/L
0.005
<DLR
<DLR
Thiobencarb
mg/L
0.07
<DLR
<DLR
1,1,1 -Trichloroethane (1,1,1 -TCA)
mg/L
0.2
<DLR
<DLR
1,1,2 -Trichloroethane (1,1,2 -TCA)
mg/L
0.005
<DLR
<DLR
Trichloroethylene (TCE)
mg/L
0.005
<DLR
<DLR
Vinyl Chloride
mg/L
0.0005
<DLR
<DLR
Xylenes
mg/L
1.75
<DLR
<DLR
cis-1,2-Dichloroethylene (c-1,2-DCE)
mg/L
0.006
<DLR
<DLR
trans-1,2-Dichlorethylene (t-1,2-DCE)
mg/L
0.01
<DLR
<DLR
1,1-Dichloroethane (1,1 -DCA)
mg/L
0.005
<DLR
<DLR
1,2-Dichioropropane
mg/L
0.005
<DLR
<DLR
Trichlorofluoromethane
mg/L
0.15
<DLR
<DLR
1,1,2-Trichloro-1,2,2-Trifluoroethane
mg/L
1.2
<DLR
<DLR
Carbof Iran
mg/L
0.018
<DLR
<DLR
Glyphosate
mg/L
0.7
<DLR
<DLR
Chlordane
mg/L
0.0001
<DLR
<DLR
Heptachlor
mg/L
0.00001
<DLR
<DLR
Heptachlor epoxide
mg/L
0.00001
<DLR
<DLR
Di(2-ethyihexyl)phthalate (DEHP)
mg/L
0.004
<DLR
<DLR
Table II - 4 (cont)
CASTAIC LAKE WATER AGENCY
1998 IMPORTED WATER QUALITY
Parameter Units MCL Range Average
QG7�RD. .
INORGANIC CHEMICALS
Aluminum
mg/L
1
<DLR - 0.135
0.073
Arsenic
mg/L
0.05
<DLR - 0.03
<DLR
Barium
mg/L
1
<DLR
<DLR
Cadmium
mg/L
0.005
<DLR
<DLR
Chromium
mg/L
0.05
<DLR
<DLR
Fluoride
mg/L
1.4-2.4
0.2-0.3
0.2
Lead
mg/L
0.05
<DLR
<DLR
Mercury
mg/L
0.002
<DLR
<DLR
Nitrate (as NO3)
mg/L
10
<DLR - 2.0
<DLR
Selenium
mg/L
0.05
<DLR
<DLR
Silver
mg/L
0.1
<DLR
<DLR
RADIOACTIVITY
Gross Alpha Activity
pCi/L
15.00
<DLR
<DLR
Gross Beta Activity
pCUL
50
<DLR
<DLR
Tritium
pCill-
20,000
<DLR
<DLR
Strontium 90
pCUL
8
<DLR
<DLR
Radium 226 & 228 combined
pCUL
5
<DLR
<DLR
Uranium
pCUL
20
<DLR
<DLR
S_�1V
Color
Units
15
<5-5
<5
Odor -Threshold
Units
3
1 -1
1
Chloride
mg/L
500
47-61
51
Copper
mg/L
1
<DLR
<DLR
Foaming Agents (MBAS)
mg/L
0.5
NA
NA
Iron
mg/L
0.3
<DLR
<DLR
Manganese
mg/L
0.05
<DLR
<DLR
Sulfate
mg/L
500
70-100
77
Zinc
mg/L
5
<DLR
<DLR
Total Dissolved Solids
mg/L
1,000
288
Specific Conductance
umhos
1,600
459-678
514
ADDITIONAL CONSTITUENTS ANALYZED
pH
Units
7.3-9.9
7.8
Hardness (CaCO3)
mg/L
85-231
152
Sodium
mg/L
37-57
45
Calcium
mg/L
23-41
36
Potassium
mg/L
2.1-3.2
2.8
Magnesium
mg/L
11-20
15
LEAD AND COPPER TAP SAMPLING
Copper 90th Percentile
mg/L
1.3
NA
NA
Lead 90th Percentile
mg/L
0.015
NA
NA
WHIM"
CM
CO
Mill!
R
WHIM"
Mill!
06-M
26 -PO
Le -W
16-jdv
96 -PO
96-M
96-1*
96+r
S&PO
ING&W
ISI96-W
06 -Pr
V6.jdv
t6lier
MPO
COWAY
Okil
1'7
Z6 -PO
zwr
Z6-jdV
16.0
is-idy
W -W
06-po
Cl.
06�nr
os-uer
SP -pr
69,�
WPO
WjdV
ui C5L6
It -It m
CD
CD 0 0
0
6L6
M eq
seqoul
A
Table II - 5
Santa Clarita Valley Rainfall
1988-1998
Date
Rainfall
Total Date
Rainfall Total
Data
Rainfall
Total Date
Rainfall Total
Jan -88
327
Jan -89
0.89
Jan -90
2.89
Jan -911
1.11
Feb.88
3.39
Feb -89
4.13
Feb -90
4.23
Feb -91
5.72
Mar -W
1.16
Mar -89
1.30
Mar -90
0.22
Mar -91
11.33
Apr -88
3.98
Apr -89
0.30
Apr -90
0.48
Apr -91,
0.00
May -88
0.09
May -89
0.00
May -90
0.88
May -91
0.00
Jun -88
0.00
Jun -891
0.00
Jun -90
0.00
Jun -91
0.00
Jul -88
0.00
Jul -89
0.00
Jul -90
0.00
Jul -91
0.00
Aug -88
0.00
Aug -89
0.00
Aug -90
0.00
Aug -91
0.00
Sep.88
0.10
SeM9jO.62
0.00
Sep -90
0.00
Sep -91
0.00
Oct -88
0.00
Oct66
0.57
Oct -90
0.. 00
Oa -91
0.50
Nov -88
0.92
Nov -8937
r
Nov -90
0.63
Nov -91
0.00
Deo -88
7.14
20.05 Deo89
0.00 8.47
Deo -90
0.01
9.34 Deo -91
5.95 24.61
Date
Rainfall Total
Date
Rainfall Total I
Date I
Rainfall
Total I Date I
Rainfall Total
Jan -92
3.28
Jar -931
17.11 1
Jan -94
0.48
Jan -95
21.98
Feb -92
16.64
Feb -93
11.73
Feb -94
5.31
Feb -95
1.93
Mar -92
9.73
Mar -93
4.27
Mar -94
2.33
Mar -95
8.30
Apr -92
0.15
Apr -93
0.00
Apr -94
0.42
Apr -95
0.72
May -92
0.34
May -93
0.00
May -94
0.00
May -95
026
Jun -92
0.00
Jun -93
0.65
Jun -94
0.00
Jun -95
0.76
Jul -92
0.30
Jul -93
0.00
Jul -94
0.00
Jul -95
0.00
Aug -92
0.00
Aug -93
0.00
Aug -94
0.00
Aug -95
0.00
Sep -92
0.00 1
Sep -931
0.00
Sep -94
0.00
Sep -95
0.00
Oct -92
1.55
OG -93
0.57
Oct -940.78
Oct -95
0.00
Nov -92
0.00
Nov -93
0.75
Nov -94
0.71
Nov -95
0.00
Deo -92
725 39.24
Deo -931
1.00 36.08
Dec,94
1.94
11.97 Dec -951
2.33 36.28
Date
Rainfall
Total Date
Rainfall
Total I Date I
Rainfall Total
Jan -96
2.97
Jan -97
6.67
Jan -98
3.49
Feb -96
6.73
Feb -97
0.23
Feb -98
22.00
Mar -96
2.08
Mar -97
0.00
Mar -98
3.98
Apr -96
0.13
Apr -97
0.00
Apr -98
2.28
May -96
0.68
May -97
0.00
May -98
5.50
Jun -96
0.00
Jun -97
0.00
Jun -98
0.06
Jul -96
0.00
Jul -97
0.05
Jul -98
0.00
Aug -96
0.00
Aug-98
0.00
Sep -96
0.00
Sep -981021
Oct -96
1.30
1Dec--976.72
Oct -98
0.33
Nov -96
1.06
Nov -98
1.36
Dec -96
8.70
23:65
17.93 Deo -981
1.39 40.60
'Source Newhall County Water District
Section III
Water Demands -Existing and Projected
Section IIIA 1998 Water Demand
Tables III -1, 111-2, 111-3 and 111-4 show deliveries of water from available sources by each
retail purveyor in 1998. 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 other users in the valley. Table III -7 shows the total water produced
by all sources 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 111-8 shows the total existing
water demands as reported by the retail purveyors for 1998 and the total projected
water demands for lands within the study area of this report.
15
Table III -1
Water Production
Los Angeles County Waterworks District 36
Acre -Feet Per Year
Table 111- 2
Water Production
Newhall County Water District
Acre -Feet Per Year
1,170
33%
2,363
67%
0
--1 -1---- ____
0%
- m
3,533
1,350
34%
2,621
66%
0
0%
3,971
1,178
31%
2,672
69%
0
0%
3,850
1,147
29%
2,787
71%
0
0%
3,934
1,549
34%
2,955
66%
0
0%
4,504
1,644
34%
3,255
66%
0
0%
4,899
1,842
34%
3,548
66%
0
0%
5,390
2,127
37%
3,657
63%
22
0.4%
5,806
2,283
35%
4,041
62%
142
2%
6,466
2,367
32%
4,688
63%
428
6%
7,483
1,936
26%
4,746
63%
796
11%
7,478
1,864
25%
4,994
66%
675
9%
7,533
1,994
25%
5,160
65%
802
10%
7,956
1,977
24%
5,068
62%
1,075
13%
8,120
2,225
27%
5,103
62%
906
11%
8,234
1,675
22%
4,775
62%
1,305
17%
7,755
1,803
23%
4,871
62%
1,213
15%
7,887
9 2,309
26%
5,168
59%
1,324
15%
8,801
9 1,761
22%
4,557
56%
1,769
22%
8,087
Table III - 3
Water Production
Santa Ciarita Water Company
Acre -Feet Per Year
9,460
89%
0
0%
1, 12 Sp
11%
10,585
7,109
61%
0
0%
4,602
39%
11,711
4,091
39%
0
0%
6,454
61%
10,545
4,269
45%
0
0%
5,214
55%
9,483
6,057
48%
0
0%
6,616
52%
12,673
6,242
47% 1
0
0%
6,910
53%
13,152
5,409
39%
0
0%
8,366
61%
13,775
5,582
36%
0
0%
9,712
64%
15,294
5,079
31%
63
0.4%
11,430
69%
16,572
5,785
31%
0
0%
12,790
69%
18,575
5,983
32%
40
0.2%
12,480
67%
18,503
5,593
34%
4,781
29%
6,158 1
37%
16,532
8,288
47%
2,913
17%
6,350
36%
17,551
12,016
65%
2,901
16%
3,429
19%
18,346
10,996
55%
3,863
19%
5,052
25%
19,911
10,217
51%
1,726
9%
7,955
40%
19,898
10,445
47%
2,176
10%
9,385
43%
22,006
11,268
50%
1,068
5%
10,120
45%
22,456
11,426
56%
1 0
0%
8,893 1
44%
20,319
Table III - 4
Water Production
Valencia Water Company
Acre -Feet Per Year
5,995
73%
2,206
u
27%
u
0
0%
8,201
5,597
61%
2,329
25% '
1,214
13%
9,140
3,415
46%
897
12%
3,060
42%
7,372
3,387
44%
611
8%
3,764
48%
7,762
4,975
50%
854
9°/a
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
9 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
.5O,
19,874
Table III - 5
Water Production
Water Purveyors - Total (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
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
9 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
(a) Includes LACWD 36, NCWD, SCWC, VWC
Table III - 6
Water Production
Other
Acre -Feet Per Year
11,331
3,500
20
0
14,851
13,237
3,500
20
0
16,757
9,684
3,500
521
0
13,705
7,983
11,237
9,328
3,500
454
0
11,937
3,500
640 0
15,377
3,500
575 0
13,403
8,287
6,512
5,951
3,500
510
0
12,297
3,500
599 0
10,611
3,500
524 0
9,975
8. 6,243
3,500
542
0
10,285
8,225
2,500
559
0
11,284
7,039
2,740
500
0
10,279
8,938
8,020
1,756
2,298
466
459
987
443
11,160
10,777
10,606
2,459
494
311
13,559
9 11,174
12,020
2,700
1,737
473
813
6
780
14,347
14,570
12,826
1,500
993
1,067
15,319
9 10,250
2,500
849
12
13,599
(a) includes LA County Honor Faun & Others.
(Honor Farm Usage is an estimate)
(b) includes Newhall Land & Farming Company (NLF) &
Valencia Country Club.
(NLF usage is an estimate during the years 1980-1995)
(c) includes LA County Honor Farm.
Table III - 7
Water Production
Total
Acre -Feet Per Year
,•'�. �+_L`�+�atr
� :tel+s j�Fy .._
��;r� `7
_ --
a
.1
11
•1 me
Table III - 8
Existing and Projected Water Demand
Total Existing Demand Reported by Purveyors -1998 (1) 1 48,858
Development Monitoring System (2)
Pending Projects
8,509
Approved Projects
10,209
Recorded Projects
1,572
Total Existing and Projected Water Demand 1 69,148
(1) From Table III - 5
(2) Los Angeles County Regional Planning Department,
Land Management Agency (October 26, 1998)
Section IV
Water Conservation
Section IV.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 Elementaly Education Program_
During the 1997/98 school year, a total of 3,278 students 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 hundreds of plant species. The
16
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
1998, local residents and community groups contributed a total of 2,655 volunteer
docent hours.
Adult Landscape Education Program
A total of 600 adults participated in the 1997/98 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.
17
Radio: A series of five public service announcements along with 21 advertisements air
monthly on a year-round basis on the local radio station, KBET-AM. The 60 -second paid
spots alternately present information on water -wise landscaping and residential water
conservation. The three-minute public service announcements are abbreviated versions
of the CLWA Speakers Bureau speeches.
Direct Mail: Approximately 50,000 1998 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 Waterwhich provides information on how people
can preserve water resources.
An in -theater, on-screen advertising campaign by CLWA is currently underway on 24
movie screens in two theaters in Santa Clarita. The Disney Productions feature movie,
"Mighty Joe Young," was filmed at the CLWA Conservatory Garden. While this hit movie
is appearing in the local theaters, water conservation messages presented by CLWA
appear prior to all the theater's movies.
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
ID
and residential purposes. The other full-color brochures in the series stress the
importance of wise -water use.
The CLWA web site htto://www.clwa.oral 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. During 1998, the
CLWA web site received 4,000 hits.
A bill-stuffer campaign featuring pre-printed AWWA stuffers is planned by CLWA and its
retailers for distribution in the Spring of 1999.
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
1,600 people toured the plant in 1998.
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 1998 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. Also
each May, children's suggestions on how to save water are aired every morning on the
local radio station, KBET-AM.
W1
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 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. Tum 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 CLWA logos
Totebags - 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
1001
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.
21
Section V
Summary of Water Supply and Demand
Section V.A Results for 1998
Table V-1 shows a summary of the current available water supply, the total water
demand reported in 1998 by the purveyors and the projected water demand generated
from projects tracked by Los Angeles County's DMS.
In 1998, the Committee reports a total water supply of approximately 107,000 acre-feet
per year, an existing water demand from all purveyors of 48,858 acre-feet and a
projected water demand reported by DMS of 20,290 acre-feet. The Santa Cladta Valley
currently has a surplus of supply of about 38,000 acre-feet 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.
Section V.13 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 1999, CLWA is planning to increase their supply of water from the SWP. CLWA's
IWRP recommends the acquisition of 40,000 acre-feet of State Water Project
Entitlement that will make the agency's existing entitlements more reliable while adding
22
I
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 state 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.
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 criteria 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.
23
Table V -1
Water Supply/Demand Outlook
Total Existing Supply Reported by Purveyors
Total Existing Demand Reported by Purveyors - 1998 (1)
Development Monitoring System (2)
Pending Projects
Approved Projects
Recorded Projects
Projected Water Demand
Total Exisitng and Projected Water Demand
Net Available Supply
(1) From Table III - 5
(2) Los Angeles County Regional Planning Department,
Land Management Agency (October 26, 1998)
48,858
8,509
10,209
1,572
20,290
69,148
107,000
Section VI
References
1. Castaic Lake Water Agency, 1998, Draft Integrated Water Resources Plan,
Water Demand and Supply Evaluation.
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., 1998, 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 IL
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.
24
Section VII
Appendix A
25
UPPER SANTA CLARA VALLEY WAITER CMyffIT E7.
22722 W. Soledad Canyon Road • P.O. Bos 903 • Santa Clarita. CA 91380-9C:).; • (805) 259-2737
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
Dear 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.
HERS
Los Angeles County Waterworks District No. 36 • Newhall County Water D'atrict 0 Santa Clarita Water Comparry • Valencia Water Companv • Castaic Lake Water'.;
-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"• GZ
W. J. Manet a, Jr.
Santa Clarita Water Company and
Cu " U er Santa Clara Water Committee
airman, pp
Robert J./DiPrimio Robert C. Sagehorn
Valencia Water Company Castaic Lake Water Agency
0
Thomas Shollenberger
Newhall County Water District
WJM/naf
Enclosure
D" ctb7
Dean Efst thiou
L.A. County Waterworks Distr. No. 36
TABLE OF CONTENTS
Santa Clarita Valley Water Report
Water Year 1999
I. Introduction
1. Background
2. Description of Water Companies
3. Purpose of Report
(A factual rapresentation of Valley's water resources; information
presented does not overstate nor understate water demand or supply)
II. Water Supplies
1. Local Water Supplies
A. Alluvium Aquifer
B. Saugus Aquifer
C. Groundwater Extractions
D. Groundwater Elevations
2. Imported Water Supplies
A. Water Supply Entitlement
B. Imported Water Deliveries
C. Water Supply Reliability
3. Water Quality
A. Groundwater
B. Imported Water
4. Other Water Supplies
A. Water Recycling
III. Water Demand - Existing and Projected
1. Existing Water Demands
2. Projected Water Demands
(From Los Angeles County Regional Planning Department, Development
Monitoring System)
3. Total Water Demand - Existing and Projected
IV. Water Conservation
1. Current Practices
V. Summary of Water Supply and Demand for Water Year 1999
City of
Santa Clarita
23920 valency biva.
Suite - )
Santa ("arra
Califorraa 91355-2196
December 10, 1998
rncne
E:,S) 259.23H
(805)259.815
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 arty
Mayor
JAD:LPC:Ikl
er.maTmuese.Y
cc: City Councilmembers
Anthony J. Nisich, Director of Transportation & Engineering Services
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