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

153,389

Number of Accounts

28,987

Number of SF RWS Connections

6

Connections To SF RWS Mains

BDPL 3 and 4

Avg. Day Demand (mgd)

17.08

Avg. Day Purchases From SF RWS (mgd)

 9.09

%  Demand Met With SF RWS Supplies

53%

Maximum Local Water Production (mgd)

1.13

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
FY 14-15
(ccf)

Actual
FY 15-16
(ccf)

Actual
FY 16-17
(ccf)

Actual
FY 17-18
(ccf)

San Francisco Water

3,874,640

3,894,246

4,066,178

4,435,240

Santa Clara Valley WD

3,276,953

2,858,242

3,458,667

3,734,325

Local Groundwater

506,472

65,632

61,977

49,601

Surface Water

0

0

0

0

Recycled Water

137,016

390,696

157,626

114,275

Other

0

0

0

0

Total

7,795,081

7,208,816

7,744,448

8,333,441

mgd equivalent

15.97

14.77

15.87

17.08

 

 

 

 

 

Demand by Sector

 

 

 

 

Residential

4,885,613

3,907,240

4,135,875

4,499,086

Commercial/Industrial

1,710,519

1,508,808

1,576,363

1,702,300

Other

1,821,591

2,221,230

371,966

376,643

Dedicated Irrigation

857,993

629,772

1,100,904

916,239

Unaccounted for

229,884

450,574

559,340

839,172

Total

7,795,081

7,208,816

7,744,448

8,333,441

mgd equivalent

15.97

14.77

15.87

17.08

 

 

 

 

 

Per Capita Use

Actual
FY 14-15
(gpcpd)

Actual
FY 15-16
(gpcpd)

Actual
FY 16-17
(gpcpd)

Actual
FY 17-18
(gpcpd)

Residential

68

54

57

60

Gross (Less Recycled Water)

106

94

104

110

 

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
(in.)

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