City guide · ZIP / utility based
San Diego tap water quality
San Diego ZIPs often map to the City of San Diego system or neighboring agencies. Coastal and inland matches can differ.
Honest framing: This is not a citywide water score. We match your ZIP to a public water system using CA service-area data where available. Contaminant lists are curated detections — non-detects are omitted. Educational only — not medical advice, not a faucet lab test, and not affiliated with EWG or any utility.
About 76 ZIP codes in our index are labeled San Diego (San Diego County). Pick an example below or enter your own ZIP.
Example ZIPs in San Diego
92101 San Diego
92154 San Diego
92102 San Diego
92103 San Diego
92104 San Diego
92105 San Diego
92106 San Diego
92107 San Diego
92108 San Diego
92109 San Diego
92110 San Diego
92111 San Diego
Utilities often matched near San Diego
Names come from public CA water-system records for ZIPs labeled San Diego. Your block may differ — always open the ZIP report.
- San Diego, City of
- Cal-Am Water Coronado
- Nas North Island & Nab Coronado
- Carlsbad Desalination Plant
Want the full drinking water report?
Open a ZIP report for curated detections vs EPA limits and CA health guidelines. Open report for 92101 →
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