Interim Enhanced Surface Water Treatment Rule violations in Oregon
80 active public water systems in Oregon had a Interim Enhanced Surface Water Treatment Rule violation in the past three years, 20 of them in the latest quarter of EPA's data. What Interim Enhanced Surface Water Treatment Rule is and why it matters.
Systems with a Interim Enhanced Surface Water Treatment Rule violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Riddle, City of Douglas County |
1,224 | 4 | 0 | |
|
Port Orford, City of Curry County |
1,200 | 4 | 0 | |
|
Drain, City of Douglas County |
1,194 | 3 | 0 | |
|
Falls City, City of Polk County |
1,051 | 3 | 0 | |
|
Yoncalla, City of Douglas County |
1,050 | 3 | 1 | |
|
Yachats, City of Lincoln County |
1,006 | 7 | 1 | |
|
Oakland, City of Douglas County |
954 | 4 | 1 | |
|
Buell-Red Prairie WD Polk County |
800 | 8 | 0 | |
|
Panther Creek WD Lincoln County |
800 | 5 | 0 | |
|
Georgia-Pacific, Wauna Mill Clatsop County |
760 | 3 | 0 | |
|
Beaver Water District Tillamook County |
600 | 4 | 0 | |
|
Mapleton Water District Lane County |
600 | 8 | 0 | |
|
Gates, City of Marion County |
458 | 2 | 0 | |
|
Fishhawk Lake Reserve and Community Columbia County |
350 | 6 | 1 | |
|
Sunstone Boulder Creek Lincoln County |
350 | 5 | 0 | |
|
Row River Valley Water Dist Lane County |
340 | 7 | 1 | |
|
Cascade Pacific Pulp LLC Linn County |
300 | 3 | 0 | |
|
Sunstone Bear Creek Lincoln County |
275 | 5 | 0 | |
|
Elkton, City of Douglas County |
187 | 2 | 0 | |
|
Timber Water Association Washington County |
180 | 9 | 2 | |
|
Hiland WC Riverbend Lincoln County |
172 | 3 | 0 | |
|
Midland Water Association Columbia County |
160 | 8 | 1 | |
|
Beverly Beach Water District Lincoln County |
152 | 5 | 0 | |
|
Camp Tapawingo Polk County |
150 | 3 | 0 | |
|
Detroit Water System Marion County |
100 | 4 | 0 | |
|
Usfs Tiller Ranger Station Douglas County |
34 | 2 | 0 | |
|
Trollers Cove Water Assn Lincoln County |
32 | 4 | 0 | |
|
Chr District Improvement CO Tillamook County |
25 | 2 | 0 | |
|
Johnson Creek Water Service Lincoln County |
0 | 4 | 1 | |
|
Lake Oswego Tigard Water Supply Clackamas County |
0 | 3 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Interim Enhanced Surface Water Treatment Rule, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Interim Enhanced Surface Water Treatment Rule 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.