Vashon, Washington Water Quality Report
Water quality data for 9 water systems serving 8,517 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Resolved Violations (500)
41
Aug 1, 2025 — Aug 31, 2025
41
Aug 1, 2025 — Aug 31, 2025
71
Jul 1, 2024
71
Jul 1, 2024
71
Jul 1, 2024
+ 495 more resolved violations
Frequently Asked Questions
Is Vashon tap water safe to drink?
Vashon'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 Vashon tap water?
0 contaminants have been detected in Vashon's water supply across 9 water systems. See the full contaminant table above for details.
How can I improve my water quality in Vashon?
Install a water filter rated for the specific contaminants found in Vashon's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Vashon have any water quality violations?
Yes, Vashon currently has 32 active violations. See the violations section above for details.