City guide · ZIP / utility based
Fontana tap water quality
Fontana ZIPs map to local systems in San Bernardino County. Reports are ZIP→utility based, not a whole-city grade.
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 5 ZIP codes in our index are labeled Fontana (San Bernardino County). Pick an example below or enter your own ZIP.
Example ZIPs in Fontana
Utilities often matched near Fontana
Names come from public CA water-system records for ZIPs labeled Fontana. Your block may differ — always open the ZIP report.
- San Gabriel Valley WC - Fontana
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