Who supplies my water · CA
Where Atherton's tap water comes from
EPA records point to California Water Service as the water system for Atherton.
San Mateo County · Population 7,022
The water system for Atherton
California Water Service
PWSID CA4110006 · Purity Score 95/100 (Excellent) · Confidence: moderate · Assessed at the water-system levelAbout 100% of Atherton's homes are inside California Water Service's service area (EPA service-area map).
System-level records from EPA. Not a test of your tap.
ZIP codes in Atherton
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.
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Follow Atherton's water
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