California Water Service - South San Francisco District

341 North Delaware Street

San Mateo, California  94401-1727

Phone: (650) 588-7800                               Fax: (650) 588-1341

Web: calwater.com

 

Service Area

 

The South San Francisco District, located in north San Mateo County, serves South San Francisco, Colma, a small portion of Daly City, and Broadmoor, an unincorporated area located between Colma and Daly City.

 

System

 

Profile

 

Area Size

11.2 square miles

Service Population

61,223

Number of Accounts

16,308

Number of SF RWS Connections

11

Connections To SF RWS Mains

Crystal Springs #2, San Andreas 1, 2, and 3, Sunset Pipeline

Avg. Day Demand (mgd)

6.03

Avg. Day Purchases From SF RWS (mgd)

4.91

%  Demand Met With SF RWS Supplies

81.3%

Maximum Local Water Production (mgd)

1.37

Alternative Supply Sources

Ground Water Wells

Interties With Other Agencies

Brisbane, San Bruno, Daly City, San Francisco

Local Storage (mg)

8.125

Days of Storage

1.08 - Length of storage based on loss of all sources of supply. All zones can meet the 8 hr criteria either separately or by pumping from zones with excess capacity. Could increase well output in an emergency to meet partial demand.

 

Summary

 

The South San Francisco District, normally receives over 80% of its water from the SF RWS from 11 turnouts off the San Andreas and Crystal Spring pipelines, with the remaining water pumped from 8 local district wells. Cal Water had been participating in a Conjunctive Use Pilot Program during which the South San Francisco District had received 100% of its supply from the SF RWS. However, in 2007 Cal Water began operating its well again. The distribution system includes 15 pressure zones, 8 wells, 25 booster pumps, 14 storage reservoirs, 1,436 hydrants, and 160 miles of main.

 

Water Supply and Demand

 

Supply by Source

Actual
FY 12-13
(ccf)

Actual
FY 13-14
(ccf)

Actual
FY 14-15
(ccf)

Actual
FY 15-16
(ccf)

SF RWS - Customary

3,351,878

3,144,748

2,745,921

2,394,025

SF RWS - Supplemental

0

0

0

38,981

Local Groundwater

268,948

471,510

524,745

511,717

Surface Water

0

0

0

0

Recycled Water

0

0

0

0

Other

0

0

0

0

Total

3,620,826

3,616,258

3,270,666

2,944,723

mgd equivalent

7.42

7.41

6.70

6.03

 

 

 

 

 

Demand by Sector

 

 

 

 

Residential

1,478,039

1,432,239

1,271,240

1,157,906

Commercial/Industrial

1,895,035

1,912,861

1,784,482

1,627,433

Other

167,479

178,111

131,918

92,474

Unaccounted for

80,273

93,047

83,026

66,910

Total

3,620,826

3,616,258

3,270,666

2,944,723

mgd equivalent

7.42

7.41

6.70

6.03

 

 

 

 

 

Per Capita Use

Actual
FY 12-13
(gpcpd)

Actual
FY 13-14
(gpcpd)

Actual
FY 14-15
(gpcpd)

Actual
FY 15-16
(gpcpd)

Residential

51

49

43

39

Gross

125

123

109

99

 

Facilities and Distribution

Storage Reservoirs

 

Designation

Type

Capacity (gallons)

 

Designation

Type

Capacity (gallons)

Sta. 001-Tank 1

Steel

500,000

 

Sta. 013-Res.10, Tank 1

Steel

500,000

Sta. 001-Tank 2

Steel

75,000

 

Sta. 011-Res. 7, Tank 1

Steel

250,000

Sta. 005-Res. 2

Concrete

1,500,000

 

Sta. 011-Res. 7, Tank 2

Steel

500,000

Sta. 008-Res. 1

Concrete

1,500,000

 

Sta. 012-Res. 9, Tank 1

Steel

500,000

Sta. 004-Res. 4, Tank 3

Steel

250,000

 

Sta. 014-Res. 11, Tank 1

Steel

1,000,000

Sta. 004-Res. 4, Tank 4

Steel

250,000

 

Sta. 015-Res. 12, Tank 1

Steel

1,000,000

Sta. 009-Tank 3

Redwood

50,000

 

Sta. 101-Tank 1

Steel

250,000

Total

 

 

 

 

 

8,125,000

               

 

Wells

 

Name

Capacity (gpm)

Status*

Well 02

60

Inactive

Well 14

90

Inactive

Well 15

95

Active

Well 17

200

Inactive

Well 18

340

Inactive

Well 19

160

Active

Well 20

150

Active

Well 21

220

Active

Well 22

295

Active

Well 23

300

Active

Total

1,220

(Active wells only)

 

Interties

 

Name

No.

Diameter
(in.)

Brisbane

1

16

San Bruno

1

6

Daly City

5

2, 4, 4, 8, 10