Oregon water quality by county
36 counties with public water systems. Pick a county to see every system that serves it.
| County | Active systems | People served | Share with violations, 3 yr | Serious violators | Health flags |
|---|---|---|---|---|---|
| Baker County | 25 | 14,603 | 0 | 1 | |
| Benton County | 47 | 72,278 | 4 | 2 | |
| Clackamas County | 243 | 386,217 | 1 | 4 | |
| Clatsop County | 31 | 41,699 | 2 | 0 | |
| Columbia County | 59 | 40,230 | 2 | 2 | |
| Coos County | 46 | 51,496 | 7 | 5 | |
| Crook County | 38 | 16,670 | 0 | 2 | |
| Curry County | 37 | 18,931 | 3 | 0 | |
| Deschutes County | 139 | 205,286 | 0 | 0 | |
| Douglas County | 104 | 93,574 | 4 | 4 | |
| Gilliam County | 6 | 1,588 | 0 | 0 | |
| Grant County | 14 | 5,018 | 0 | 1 | |
| Harney County | 11 | 5,315 | 0 | 0 | |
| Hood River County | 23 | 27,813 | 1 | 0 | |
| Jackson County | 203 | 197,089 | 9 | 1 | |
| Jefferson County | 31 | 27,071 | 0 | 0 | |
| Josephine County | 151 | 59,719 | 6 | 1 | |
| Klamath County | 110 | 59,008 | 9 | 1 | |
| Lake County | 19 | 4,699 | 2 | 2 | |
| Lane County | 233 | 327,098 | 5 | 4 | |
| Lincoln County | 52 | 61,835 | 2 | 0 | |
| Linn County | 167 | 125,413 | 2 | 7 | |
| Malheur County | 24 | 22,459 | 4 | 2 | |
| Marion County | 197 | 369,909 | 7 | 3 | |
| Morrow County | 16 | 13,695 | 0 | 0 | |
| Multnomah County | 59 | 854,716 | 2 | 1 | |
| Polk County | 28 | 53,657 | 1 | 0 | |
| Sherman County | 12 | 3,709 | 0 | 0 | |
| Tillamook County | 63 | 34,035 | 1 | 0 | |
| Umatilla County | 77 | 71,867 | 1 | 1 | |
| Union County | 23 | 21,177 | 1 | 0 | |
| Wallowa County | 9 | 5,359 | 0 | 0 | |
| Wasco County | 44 | 26,028 | 2 | 1 | |
| Washington County | 97 | 598,167 | 3 | 1 | |
| Wheeler County | 5 | 942 | 0 | 0 | |
| Yamhill County | 93 | 90,887 | 0 | 0 |
under 30% 30 to 59% 60% and over
About this data
Share with violations counts any violation in the past three years, including monitoring and reporting lapses. Counts cover active systems; systems serving more than one county are counted in each.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Oregon records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.