City guide · ZIP / utility based
Sunnyvale tap water quality
Sunnyvale ZIPs typically map to the city utility. Contaminant numbers are on the ZIP report, not this landing page.
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 Sunnyvale (Santa Clara County). Pick an example below or enter your own ZIP.
Example ZIPs in Sunnyvale
Utilities often matched near Sunnyvale
Names come from public CA water-system records for ZIPs labeled Sunnyvale. Your block may differ — always open the ZIP report.
- City of Sunnyvale
- Cwsc Los Altos Suburban
Want the full drinking water report?
Open a ZIP report for curated detections vs EPA limits and CA health guidelines. Open report for 94085 →
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