Cornelius, Oregon Water Quality Report
Water quality data for 3 water systems serving 14,605 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (19)
71
Jul 1, 2025
75
Apr 10, 2025
2E
Oct 17, 2024
72
Oct 1, 2024
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (201)
71
Jul 1, 2025
31
Mar 1, 2025 — Mar 31, 2025
31
Jan 1, 2025 — Jan 31, 2025
72
Oct 1, 2024
71
Jul 1, 2024
+ 196 more resolved violations
Frequently Asked Questions
Is Cornelius tap water safe to drink?
Cornelius'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 Cornelius tap water?
0 contaminants have been detected in Cornelius's water supply across 3 water systems. See the full contaminant table above for details.
How can I improve my water quality in Cornelius?
Install a water filter rated for the specific contaminants found in Cornelius's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Cornelius have any water quality violations?
Yes, Cornelius currently has 19 active violations. See the violations section above for details.