E. coli (Escherichia coli) violations in Oregon
204 active public water systems in Oregon had a E. coli (Escherichia coli) violation in the past three years, 204 of them in the latest quarter of EPA's data. What E. coli (Escherichia coli) is and why it matters.
Systems with a E. coli (Escherichia coli) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Westlake Resort Lane County |
25 | 1 | 1 | |
|
Wildwood Annex Water District Clackamas County |
25 | 4 | 1 | |
|
Calkins Acres Improvement INC Lincoln County |
21 | 2 | 1 | |
|
Usfs Chemult Ranger Station Klamath County |
20 | 3 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved E. coli (Escherichia coli), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not E. coli (Escherichia coli) alone.
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.