California Water Quality
Check tap water quality for any ZIP code in California. See contaminants, violations, and health risks for your water system.
Enter a California ZIP code to get your free water quality report.
Water Quality in California
Key factors and concerns
California has some of the most diverse water quality challenges in the nation. Issues range from agricultural pesticide contamination in the Central Valley to PFAS near military bases, naturally occurring chromium-6, and drought-related water scarcity.
What's in your California water report
Contaminant levels
Every detected contaminant in your California water system, compared to EPA limits and health guidelines.
Violation history
All EPA violations on record for water systems in California, including health-based and monitoring violations.
Water quality grade
An A through F grade based on violation history, contaminant levels, and health guideline comparisons.
Filter recommendations
Which type of water filter will actually remove the contaminants found in your specific water system.
Check your California water now
Enter your ZIP code for a free water quality report specific to your water system in California.
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