The District has an operating budget of approximately $4 million and a capital improvement budget of $2.5 million. The District's workforce consists of 7 administrative and 9 field personnel.

Water Supply
CCWD has four water supply sources: Pilarcitos Lake, Crystal Springs Reservoir, Pilarcitos Well Field and the Denniston Project. The first two are owned and operated by the San Francisco Water Department; the latter two are owned and operated by CCWD. The system consists of two water treatment plants, 17 miles of transmission pipeline, 83 miles of distribution pipeline, several water storage tanks, and other equipment.

The average annual yield from these four sources is about 900 million gallons. Approximately 35% of the District's water supply is produced locally from both wells and surface water. The remaining 65% is purchased from the San Francisco Water Department.

The District operates wells adjacent to Denniston and Pilarcitos Creeks. It also diverts surface water from Denniston Creek.

Water from San Francisco is supplied by gravity flow from Pilarcitos Reservoir or is pumped over the mountain from Crystal Springs Reservoir.

Pilarcitos Reservoir can produce up to 2.5 million gallons per day by gravity flow. When the daily demand exceeds the 2.5 million gallons from Pilarcitos Lake, water is taken from the Crystal Springs Reservoir Pump Station. Water in Crystal Springs Reservoir comes from the Hetch Hetchy supply in Little Yosemite Valley in the Sierras. The Crystal Springs Water Supply project was completed in 1994 and consists of an eight-mile pipeline connected to a pump station and intake tunnel under the reservoir terminating at the Nunes Water Treatment Plant.

Deliveries taken from Crystal Springs Reservoir and Pilarcitos Lake are limited by the capacity of the Nunes Plant, currently 4.5 mgd. Water is taken from Crystal Springs when it is not available from Pilarcitos Lake. However, this source is more costly than Pilarcitos water because of associated pumping costs. The Pilarcitos Well Field and the Denniston Project also supply water. Water from the Pilarcitos Well Field is limited to pumping between November and March and cannot exceed 117 mg per water year. Water from the Denniston Project consists of both stream diversions and wells. The average annual yield from these two sources is approximately 75 mg and 100 mg, respectively.

Additional water supply information is available in the downloadable PDF version of the Water Supply Evaluation Report. (PDF files require the Adobe Acrobat Reader – free download available.)

Distribution
Water enters the system from two sources. In the north end of the District, it enters the Denniston Water Treatment Plant from the Denniston Project, near Half Moon Bay Airport. At Half Moon Bay, it enters the system via the Pilarcitos Pipeline and flows into the Nunes Water Treatment Plant. From there it flows into storage tanks for subsequent use in the system. There are 100 miles of transmission and distribution pipeline in the CCWD system. There are also ten treated water storage tanks in the system which have a combined storage capacity of 8.1 million gallons. The District maintains a distribution system that includes three pressure zones, five pump stations, 500 hydrants, and 52 miles of water mains.

The District is responsible for maintaining and upgrading the water distribution pipeline that runs throughout the service area. The District has an ongoing pipeline replacement program that continually removes sections of old inefficient pipeline and replaces it with new ductile iron pipeline that reduces leaks and reassures more water for firefighting purposes.

Water Quality
Coastside County Water District is committed to developing and providing a high level of quality water for our customers. The District monitors water quality continuously at our treatment plants and water samples are taken frequently from a variety of locations throughout our service area. All water delivered to our customers meets or surpasses state and federal standards for drinking water.

Each year Coastside County Water District produces our Annual Water Quality Report (PDF files require the Adobe Acrobat Reader – free download available), also referred to by some agencies as a Consumer Confidence Report. This report meets both federal and state reporting requirements and is distributed to all District customers by July 1st of each year.

Coastside County Water District is proud of the level of service we provide to our customers. If you have any questions, concerns or desire additional information regarding this report, please contact the District Superintendent, David Mier, at 650-726-4405.

Fluoridation
08/24/05 – The SFPUC is about to add Fluoride to its water treatment system. It is a requirement in California for those water systems with more than 10,000 connections. Because we get their untreated water, we will NOT be getting the Fluoride. We are not required to add Fluoride ourselves because we have less than 10,000 connections. There are some very helpful links below from the SFPUC which answer many questions about Fluoride. These appear to be slanted to the positive side of Fluoride addition [not unexpected since they are about to add it to their system]. The main point here for CCWD customers is that because we get the UNTREATED SFO water, we will NOT be getting the Fluoride. There will probably be news articles about the Fluoride addition in the near future.

We have very low levels of naturally occuring Fluoride in our source waters: 0.2 parts/million [ppm] in Denniston Reservoir, 0.43 ppm in the Denniston well field and 0.13 ppm in the Pilarcitos well field. The maximum contaminant level [mcl] is 2 ppm.

1. Map of currently fluoridated and newly-fluoridated areas.
2. Customer service numbers for both currently fluoridated and newly fluoridated agencies.
3. Frequently asked questions about fluoridation.

Water Demand/Customer Base

© 2008 Coastside County Water District. All rights reserved.
766 Main Street, Half Moon Bay, CA 94019
Tel. 650-726-4405 • Fax 650-726-5245