Sunnyvale, City of
Environmental Services Department
P.O. Box 3707
Sunnyvale, California 94088-3707
Phone: (408) 730-7510 Fax: (408) 736-1611
Web: sunnyvale.ca.gov
Service Area
The City of Sunnyvale is an urban industrial and residential community located at the south end of the Peninsula in Santa Clara County, with a service area for the water utility contiguous with its city limits. California Water Service also serves several small areas within the City.
System
Profile
|
Area Size |
24 square miles |
|
Service Population |
156,317 |
|
Number of Accounts |
29,423 |
|
Number of SF RWS Connections |
6 |
|
Connections To SF RWS Mains |
BDPL 3 and 4 |
|
Avg. Day Demand (mgd) |
15.31 |
|
Avg. Day Purchases From SF RWS (mgd) |
7.92 |
|
% Demand Met With SF RWS Supplies |
51.78% |
|
Maximum Local Water Production (mgd) |
1.12 |
|
Alternative Supply Sources |
Local Groundwater |
|
Interties With Other Agencies |
CWS, SCVWD, Mountain View, Cupertino |
|
Local Storage (mg) |
27.5 |
|
Days of Storage |
More Than 1 Day - Length of storage based on loss of all sources of supply. With loss of SF RWS supply only, City can utilize wells, SCVWD or excess capacity from other zones to meet 8 hour outage. |
Summary
Sunnyvale’s water utility receives water supplied from SF RWS via 6 turnouts off BDPL 3 and 4 in the northern section of the City. The SCVWD connections are located in the far southwest corner of the City. Water from SCVWD is primarily served from the District’s Rinconada WTP. A few formerly unincorporated County of Santa Clara pockets are currently served by CWS, backed up by interties with the City.
Groundwater is provided by 7 active wells, with 1 well on stand-by status. Water from these wells meets all current drinking water standards without treatment. The wells are used to meet peaking requirements and to supply water for fire and other emergencies. Due to the overall cost of producing well water, including pump tax, power, operation and maintenance expenses, and amortization, it is cost-effective for the City to maximize use of water from SF RWS and SCVWD.
The City has 10 ground storage tanks, with a minimum of 1 storage tank in every zone, and additional tanks located at water plants in the City.
The potable distribution system is completely interconnected and includes 3 pressure zones, 21 booster pumps, 3,310 fire hydrants, more than 10,000 manual and automatic valves, and 280 miles of mains. Recycled non-potable water is used for irrigation services.
Water Supply and Demand
|
Supply by Source |
Actual |
Actual |
Actual |
Actual |
|
San Francisco Water |
4,552,465 |
4,686,275 |
4,490,365 |
3,866,964 |
|
Santa Clara Valley WD |
3,883,226 |
4,051,093 |
3,561,374 |
3,493,579 |
|
Local Groundwater |
40,733 |
36,312 |
58,775 |
54,637 |
|
Surface Water |
0 |
0 |
0 |
0 |
|
Recycled Water |
255,326 |
83,796 |
134,003 |
53,557 |
|
Other |
0 |
0 |
0 |
0 |
|
Total |
8,731,750 |
8,857,476 |
8,244,518 |
7,468,737 |
|
mgd equivalent |
17.89 |
18.15 |
16.90 |
15.31 |
|
|
|
|
|
|
|
Demand by Sector |
|
|
|
|
|
Residential |
4,825,227 |
5,120,577 |
4,578,634 |
4,218,393 |
|
Commercial/Industrial |
1,585,185 |
1,495,257 |
1,525,048 |
1,420,780 |
|
Other |
98,796 |
100,508 |
90,000 |
79,468 |
|
Dedicated Irrigation |
1,466,128 |
1,689,040 |
1,370,146 |
1,139,508 |
|
Non-Revenue Water |
756,414 |
452,095 |
680,690 |
610,588 |
|
Total |
8,731,750 |
8,857,476 |
8,244,518 |
7,468,737 |
|
mgd equivalent |
17.89 |
18.15 |
16.90 |
15.31 |
|
|
|
|
|
|
|
Per Capita Use |
Actual |
Actual |
Actual |
Actual |
|
Residential |
63 |
67 |
60 |
55 |
|
Gross (Less Recycled Water) |
111 |
115 |
106 |
97 |
Facilities and Distribution
Storage Reservoirs
|
Designation |
Type |
Capacity (gallons) |
|
Designation |
Type |
Capacity (gallons) |
|---|---|---|---|---|---|---|
|
Wolfe-Evelyn |
Steel |
5,000,000 |
|
Central 1 |
Steel |
500,000 |
|
Mary-Carson 1 |
Steel |
5,000,000 |
|
Central 2 |
Steel |
500,000 |
|
Mary-Carson 2 |
Steel |
5,000,000 |
|
Hamilton 1 |
Steel |
500,000 |
|
Wright Avenue 1 |
Steel |
5,000,000 |
|
Hamilton 2 |
Steel |
500,000 |
|
Wright Avenue 2 |
Steel |
5,000,000 |
|
Hamilton 3 |
Steel |
500,000 |
|
|
|
|
|
Total |
|
27,500,000 |
Wells
|
Name |
Capacity (mgd) |
Status |
|---|---|---|
|
Westmoor |
0.8 |
Active |
|
Serra |
0.9 |
Active |
|
Ortega |
2.0 |
Active |
|
Raynor |
2.7 |
Active |
|
Hamilton (1). |
2.0 |
Active |
|
Hamilton (2). |
2.0 |
Active |
|
Losse |
0 |
Standby |
|
Central |
0.7 |
Inactive |
|
Schroeder |
0 |
Destroyed |
|
Total |
11.1 |
|
Interties
|
Name |
No. |
Diameter |
|
SCVWD |
2 |
30, 12 |
|
Santa Clara |
3 |
10 |
|
|
2 |
12 |
|
|
1 |
8 |
|
CWS |
5 |
6 |
|
|
1 |
8 |
|
Cupertino |
1 |
12 |
|
Mountain View |
2 |
8 |
|
|
1 |
6 |