Mckinleyville, California Water Quality Report
Water quality data for 4 water systems serving 18,845 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (4)
4H
Jul 2, 2025
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (20)
52
Oct 1, 2022
52
Oct 1, 2022
23
Jul 1, 1993 — Jul 31, 1993
51
Jul 1, 1993 — Mar 1, 2000
23
Jul 1, 1993 — Jul 31, 1993
+ 15 more resolved violations
Frequently Asked Questions
Is Mckinleyville tap water safe to drink?
Mckinleyville'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 Mckinleyville tap water?
0 contaminants have been detected in Mckinleyville's water supply across 4 water systems. See the full contaminant table above for details.
How can I improve my water quality in Mckinleyville?
Install a water filter rated for the specific contaminants found in Mckinleyville's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Mckinleyville have any water quality violations?
Yes, Mckinleyville currently has 4 active violations. See the violations section above for details.