Montesano, Washington Water Quality Report
Water quality data for 9 water systems serving 16,157 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Resolved Violations (500)
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
+ 495 more resolved violations
Frequently Asked Questions
Is Montesano tap water safe to drink?
Montesano'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 Montesano tap water?
0 contaminants have been detected in Montesano's water supply across 9 water systems. See the full contaminant table above for details.
How can I improve my water quality in Montesano?
Install a water filter rated for the specific contaminants found in Montesano's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Montesano have any water quality violations?
Yes, Montesano currently has 7 active violations. See the violations section above for details.