Oregon drinking water quality
Oregon has 2,555 active public water systems serving 4 million people. 1,905 of them, 75%, had at least one EPA violation in the past three years, 537 have an unresolved violation today, and 85 are designated serious violators by the EPA.
Active systems
2,555
in 36 counties
People served
4M
948 community systems serve 3.8M
Violations, past 3 years
1,905
75% of active systems
Serious violators
85
50 systems carry a health flag
Largest counties
All 36 countiesLargest community water systems
All 2,555 systems| System | Serves | Status |
|---|---|---|
| Portland Water Bureau Multnomah County |
666,200 | |
| Tualatin Valley Water District Washington County |
224,600 | |
| Salem Public Works Marion County |
199,820 | |
| Eugene Water & Electric Board Lane County |
176,000 | |
| Medford Water Commission Jackson County |
106,068 | |
| Hillsboro, City of Washington County |
92,632 | |
| Beaverton, City of Washington County |
88,045 | |
| Bend, City of Deschutes County |
77,704 | |
| Gresham, City of Multnomah County |
73,932 | |
| Rockwood Pud Multnomah County |
65,443 |
About the Oregon data
Retrieved from EPA ECHO on Oct 11, 2026. EPA records for Oregon systems do not include town names, so searches here match on ZIP code, street address, or county.