Westborough Water District

2263 Westborough Boulevard
South San Francisco, California 94080-5406

Phone: (650) 589-1435                               Fax: (650) 589-5167

Web: westboroughwater.com

 

Service Area

 

The Westborough Water District is located within the City of South San Francisco in north San Mateo County. The District provides both water and sewer service, and has an agreement with the North San Mateo County Sanitation District for sewage disposal and facility maintenance.

 

System

 

Profile

 

Area Size

1 square mile

Service Population

 13,466

Number of Accounts

3,964

Number of SF RWS Connections

1

Connections To SF RWS Mains

San Andreas 1, 2, and 3

Avg. Day Demand (mgd)

0.67

Avg. Day Purchases From SF RWS (mgd)

 0.62

%  Demand Met With SF RWS Supplies

92%

Maximum Local Water Production (mgd)

0

Alternative Supply Sources

None

Interties With Other Agencies

North Coast CWD, Daly City

Local Storage (mg)

6.5

Days of Storage

6.5 - All zones can meet the required 8 hr. coverage. During emergencies, District also has access to an additional 3.5 mg in storage owned by North Coast WD.

 

Summary

 

The Westborough Water District receives its entire water supply from the San Francisco Public Utilities Commission through a single 6” turnout located on Westborough Boulevard. This water is distributed to 3 Skyline storage tanks located at the north end of the district, from which the Skyline Pump Station pumps water to the Christen Hill Reservoir for gravity distribution to Zone 3, and the Main Water Pump Station pumps water to Zones 1 and 2.

 

The Christen Hill Reservoir is shared with the North Coast County Water District.

 

The WCWD distribution system includes 3 storage tanks, 2 pumping stations, 5 pumps, and 24 miles of mains. In addition to the Christen Hill Reservoir intertie with NCCWD, the district has an intertie with Daly City.

 

Water Supply and Demand

 

Supply by Source

Actual
FY 18-19
(ccf)

Actual
FY 19-20
(ccf)

Actual
FY 20-21
(ccf)

Actual
FY 21-22
(ccf)

San Francisco Water

379,833

400,616

373,994

301,090

Local Groundwater

0

0

0

0

Surface Water

0

0

0

0

Recycled Water

0

0

0

0

Other

0

0

0

26,041

Total

379,833

400,616

373,994

327,131

mgd equivalent

0.78

0.82

0.77

0.67

 

 

 

 

 

Demand by Sector

 

 

 

 

Residential

281,152

293,470

298,605

272,559

Commercial/Industrial

34,958

33,950

28,811

30,987

Other

0

0

0

0

Dedicated Irrigation

39,384

36,286

43,134

35,092

Non-Revenue Water

24,339

36,910

3,435

-11,507

Total

379,833

400,616

373,994

327,131

mgd equivalent

0.78

0.82

0.77

0.67

 

 

 

 

 

Per Capita Use

Actual
FY 18-19
(gpcpd)

Actual
FY 19-20
(gpcpd)

Actual
FY 20-21
(gpcpd)

Actual
FY 21-22
(gpcpd)

Residential

45

47

45

41

Gross

57

65

57

50

 

Facilities and Distribution

Storage Reservoirs

 

Designation

Type

Capacity (mg)

SS Tank 1

Steel

1.5

SS Tank 2

Steel

2.5

SS Tank 3

Steel

2.0

CH Reservoir

Steel

0.5

Total

 

6.5

 

Interties

 

Name

No.

Diameter
(in.)

North Coast

1

8

Daly City

1

12