South San Francisco water and sewer rates
At typical use (6 units, about 4,500 gallons a month), a South San Francisco house pays about $60 a month for water: about $720 a year. Sewer is billed on the property tax bill instead. Estimated from public rates, not anyone's actual bill.
Who supplies water to South San Francisco houses, what it costs, and how the sewer charge works.
Pay or manage it
California Water Service, South San Francisco
Cal Water's new CPUC-approved Bayshore rates, expected to take effect July 1, 2026: a monthly service charge of $34.47 for a 5/8" x 3/4" meter, plus $4.2083 per Ccf for 1-6 Ccf, $16.8152 for 7-9 Ccf, $21.0842 for 10-13 Ccf and $25.2184 above 13 Ccf.
| Use a month | Price per unit (CCF, 748 gallons) |
|---|---|
| Fixed charge | $34.47 a month |
| 0 to 6 units | $4.21 |
| 6 to 9 units | $16.82 |
| 9 to 13 units | $21.08 |
| 13 to more | $25.22 |
- Source
- Cal Water used a combination of local groundwater and surface water purchased from the San Francisco Public Utilities Commission (SFPUC) in 2025.
- Hardness
- Total hardness in 2025: groundwater 287–461 ppm (average 384); SFPUC water 8.1–112 ppm (average 62).
Sewer
South San Francisco collects sewer charges through the San Mateo County property tax rolls. The $72.00 a month per single-unit residential dwelling shown for July 1, 2026 is a maximum proposed rate.
How South San Francisco compares with nearby cities
Water, a month
- South San Francisco$60
- Alameda · 9 mi$71
- Daly City · 6 mi$94
- San Mateo · 7 mi$110
- Burlingame · 5 mi$117
- Millbrae · 4 mi$127
Water only, at each city's typical use; sewer is left out because some cities bill it on the tax bill.
Ways to pay less
- Low-income households: sewer rebate. Customers enrolled in or meeting the income criteria of California Water Service's Customer Assistance Program are eligible for a sewer rate rebate from the City. The rebate is currently $76 per year. How: For more information, visit the City's website or call 650-877-8550.
Checked October 28, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.
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