City guide · ZIP / utility based

San Francisco tap water quality

San Francisco ZIPs typically map to SFPUC City Distribution. This is a ZIP shortcut page — open a report for detections.

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 50 ZIP codes in our index are labeled San Francisco (San Francisco County). Pick an example below or enter your own ZIP.

Example ZIPs in San Francisco

94102 San Francisco 94130 San Francisco 94103 San Francisco 94104 San Francisco 94105 San Francisco 94107 San Francisco 94108 San Francisco 94109 San Francisco 94110 San Francisco 94111 San Francisco 94112 San Francisco 94114 San Francisco

Utilities often matched near San Francisco

Names come from public CA water-system records for ZIPs labeled San Francisco. Your block may differ — always open the ZIP report.

  • SFPUC City Distribution Division
  • Treasure Island
  • San Francisco Regional Water System
  • Camp Saratoga
  • Presidio of San Francisco

Want the full drinking water report?

Open a ZIP report for curated detections vs EPA limits and CA health guidelines. Open report for 94102 →

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