Who supplies my water · CA
Where Colma's tap water comes from
EPA records point to California Water Service-S San Francisco as the water system for Colma.
San Mateo County · Population 1,428
The water system for Colma
California Water Service-S San Francisco
PWSID CA4110009 · Purity Score 95/100 (Excellent) · Confidence: moderate · Assessed at the water-system levelAbout 100% of Colma's homes are inside California Water Service-S San Francisco's service area (EPA service-area map).
Full water report for California Water Service-S San Francisco
System-level records from EPA. Not a test of your tap.
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