Surface Water Treatment Rule (SWTR) violations in Oregon
139 active public water systems in Oregon had a Surface Water Treatment Rule (SWTR) violation in the past three years, 46 of them in the latest quarter of EPA's data. What Surface Water Treatment Rule (SWTR) is and why it matters.
Systems with a Surface Water Treatment Rule (SWTR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sunstone Bear Creek Lincoln County |
275 | 5 | 0 | |
|
Westfir, City of Lane County |
268 | 4 | 0 | |
|
Sumpter, City of Baker County |
208 | 3 | 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 | |
|
Idanha City Water Linn County |
168 | 2 | 0 | |
|
Richland, City of Baker County |
165 | 5 | 1 | |
|
Midland Water Association Columbia County |
160 | 8 | 1 | |
|
Beverly Beach Water District Lincoln County |
152 | 5 | 0 | |
|
Breitenbush Hot Springs Marion County |
150 | 1 | 0 | |
|
Camp Tapawingo Polk County |
150 | 3 | 0 | |
|
Whaleshead Beach Resort, LLC Curry County |
108 | 4 | 0 | |
|
Detroit Water System Marion County |
100 | 4 | 0 | |
|
Garden Valley Water Association Coos County |
84 | 7 | 0 | |
|
Tierra del Mar Water CO Tillamook County |
80 | 4 | 1 | |
|
Camp Tilikum Yamhill County |
75 | 1 | 0 | |
|
Nps Oregon Caves National Monument O&m Josephine County |
75 | 8 | 0 | |
|
London Water Co-Op Lane County |
63 | 5 | 3 | |
|
Callahans Mountain Lodge Jackson County |
60 | 3 | 0 | |
|
Morrisons Rogue River Lodge Josephine County |
50 | 1 | 0 | |
|
Diamond Lake Gas Station Douglas County |
45 | 5 | 0 | |
|
Coos CO Pks Laverne Coos County |
40 | 2 | 0 | |
|
Weiss Estates Water System Coos County |
36 | 4 | 1 | |
|
Drift Creek Landing Lincoln County |
34 | 1 | 0 | |
|
Usfs Tiller Ranger Station Douglas County |
34 | 2 | 0 | |
|
Cascade Gorge Properties Jackson County |
33 | 8 | 1 | |
|
Trollers Cove Water Assn Lincoln County |
32 | 4 | 0 | |
|
Olallie Lake Resort Jefferson County |
30 | 2 | 0 | |
|
Pge Beaver Generating Station Columbia County |
30 | 5 | 0 | |
|
Blm Rand Rngr Sta/info Ctr Josephine County |
28 | 1 | 0 | |
|
Chr District Improvement CO Tillamook County |
25 | 2 | 0 | |
|
Kellys Brighton Marina Tillamook County |
25 | 1 | 0 | |
|
Siskiyou Field Institute Josephine County |
25 | 3 | 0 | |
|
Swisshome Village Lane County |
24 | 4 | 1 | |
|
Minikahda Water System Clackamas County |
22 | 1 | 0 | |
|
Johnson Creek Water Service Lincoln County |
0 | 4 | 1 | |
|
Lake Oswego Tigard Water Supply Clackamas County |
0 | 3 | 0 | |
|
North Clackamas County WC Clackamas County |
0 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Surface Water Treatment Rule (SWTR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Surface Water Treatment Rule (SWTR) 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.