Guerneville, California Water Quality Report
Water quality data for 4 water systems serving 9,835 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (3)
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (18)
3D
Apr 1, 2025 — Apr 30, 2025
3D
Apr 1, 2025 — Apr 30, 2025
52
Oct 1, 2019
52
Oct 1, 2019
52
Oct 1, 2019
+ 13 more resolved violations
Frequently Asked Questions
Is Guerneville tap water safe to drink?
Guerneville's water meets all EPA maximum contaminant levels. However, 0 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Guerneville tap water?
0 contaminants have been detected in Guerneville's water supply across 4 water systems. See the full contaminant table above for details.
How can I improve my water quality in Guerneville?
Install a water filter rated for the specific contaminants found in Guerneville's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Guerneville have any water quality violations?
Yes, Guerneville currently has 3 active violations. See the violations section above for details.