California Water Service - South San Francisco District
341 North Delaware Street
San Mateo, California 94401-1727
Phone: (650) 558-7800 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 |
64,146 |
|
Number of Accounts |
16,463 |
|
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) |
5.65 |
|
Avg. Day Purchases From SF RWS (mgd) |
5.50 |
|
% Demand Met With SF RWS Supplies |
97.65% |
|
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 |
Actual |
Actual |
Actual |
|
SF RWS - Customary |
2,222,223 |
2,868,442 |
2,768,049 |
2,085,311 |
|
SF RWS - Supplemental |
668,470 |
0 |
0 |
73,173 |
|
Local Groundwater |
0 |
0 |
0 |
0 |
|
Surface Water |
0 |
0 |
0 |
0 |
|
Recycled Water |
0 |
0 |
0 |
0 |
|
Other |
0 |
0 |
0 |
0 |
|
Total |
2,890,693 |
2,868,442 |
2,768,049 |
2,756,116 |
|
mgd equivalent |
5.92 |
5.88 |
5.67 |
5.65 |
|
|
|
|
|
|
|
Demand by Sector |
|
|
|
|
|
Residential |
1,107,523 |
1,214,617 |
1,153,900 |
1,184,555 |
|
Commercial/Industrial |
1,401,125 |
1,522,188 |
1,412,002 |
1,405,743 |
|
Other |
144,881 |
120,794 |
108,126 |
107,900 |
|
Non-Revenue Water |
237,164 |
10,843 |
94,021 |
57,918 |
|
Total |
2,890,693 |
2,868,442 |
2,768,049 |
2,756,116 |
|
mgd equivalent |
5.92 |
5.88 |
5.67 |
5.65 |
|
|
|
|
|
|
|
Per Capita Use |
Actual |
Actual |
Actual |
Actual |
|
Residential |
36 |
39 |
37 |
38 |
|
Gross |
94 |
92 |
89 |
88 |
Facilities and Distribution
Storage Reservoirs
|
Designation |
Type |
Capacity (gallons) |
|
Designation |
Type |
Capacity (gallons) |
|
|---|---|---|---|---|---|---|---|
|
Sta. 001-Tank 1 |
Steel |
500,000 |
|
Sta. 013-Tank 1 |
Steel |
500,000 |
|
|
Sta. 004-Tank 3 |
Steel |
250,000 |
|
Sta. 014-Tank 1 |
Steel |
1,000,000 |
|
|
Sta. 004-Tank 4 |
Steel |
250,000 |
|
Sta. 015-Tank 1 |
Steel |
1,000,000 |
|
|
Sta. 005-Tank 1 |
Concrete |
1,500,000 |
|
Sta. 101-Tank 1 |
Steel |
250,000 |
|
|
Sta. 008-Tank 1 |
Concrete |
1,500,000 |
|
|
|
|
|
|
Sta. 011-Tank 1 |
Steel |
250,000 |
|
|
|
|
|
|
Sta. 012-Tank 1 |
Steel |
500,000 |
|
|
|
|
|
|
Total |
|
|
|
|
|
8,000,000 |
|
Wells
|
Name |
Capacity (gpm) |
Status* |
|---|---|---|
|
Well 02 |
60 |
Inactive |
|
Well 14 |
90 |
Destroyed |
|
Well 15 |
95 |
Destroyed |
|
Well 17 |
200 |
Destroyed |
|
Well 18 |
340 |
Inactive |
|
Well 19 |
160 |
Active |
|
Well 20 |
150 |
Active |
|
Well 21 |
220 |
Active |
|
Well 22 |
295 |
Active |
|
Well 23 |
300 |
Active |
|
Well 24 |
300 |
Active |
|
Total |
1,505 |
(Active wells only) |
Interties
|
Name |
No. |
Diameter |
|
Brisbane |
1 |
16 |
|
San Bruno |
1 |
6 |
|
Daly City |
5 |
2, 4, 4, 8, 10 |