Coos Bay, Oregon Water Quality Report
Water quality data for 4 water systems serving 34,622 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (3)
51
Jul 1, 2025
51
Jul 1, 2025
51
Jan 1, 2025
Resolved Violations (497)
36
Sep 1, 2025 — Sep 30, 2025
38
Sep 1, 2025 — Sep 30, 2025
3A
Sep 1, 2025 — Sep 30, 2025
3A
Sep 1, 2025 — Sep 30, 2025
36
Sep 1, 2025 — Sep 30, 2025
+ 492 more resolved violations
Frequently Asked Questions
Is Coos Bay tap water safe to drink?
Coos Bay'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 Coos Bay tap water?
0 contaminants have been detected in Coos Bay's water supply across 4 water systems. See the full contaminant table above for details.
How can I improve my water quality in Coos Bay?
Install a water filter rated for the specific contaminants found in Coos Bay's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Coos Bay have any water quality violations?
Yes, Coos Bay currently has 19 active violations. See the violations section above for details.