Region guide · ZIP / utility based
San Francisco Bay Area
Bay Area ZIPs may map to large regional systems (e.g. EBMUD, SFPUC, Cal Water) or smaller community systems. Search your ZIP for the matched PWSID.
Honest framing: Overlapping service areas (especially valley cities) can show a chooser. Contaminant lists are curated detections — non-detects are omitted. Reports are educational, not medical advice, and not affiliated with EWG or any utility.
Example ZIPs to try
94102 San Francisco
94577 San Leandro / East Bay
94550 Livermore (multi)
94607 Oakland
94704 Berkeley
95014 Cupertino
95112 San Jose
94401 San Mateo
94501 Alameda
94901 San Rafael
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Preview a compact social-style card for an example ZIP, then open the full report. Open share card for 94550 →