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 |
|---|---|---|---|---|
|
Silverton, City of Marion County |
10,484 | 4 | 0 | |
|
Sheridan, City of Yamhill County |
6,494 | 7 | 0 | |
|
Myrtle Creek, City of Douglas County |
3,501 | 3 | 1 | |
|
Oprd Detroit Lake SP Marion County |
2,600 | 1 | 0 | |
|
Carlton, City of Yamhill County |
2,270 | 5 | 1 | |
|
Yamhill, City of Yamhill County |
1,199 | 5 | 1 | |
|
Hiland WC Shady Cove Jackson County |
1,000 | 5 | 0 | |
|
Rock Creek Water District Polk County |
300 | 4 | 1 | |
|
Butte Creek Scout Ranch Bsa Clackamas County |
275 | 3 | 0 | |
|
Westfir, City of Lane County |
268 | 4 | 0 | |
|
Langlois Water District Curry County |
220 | 7 | 1 | |
|
Fir Point Bible Conference Douglas County |
150 | 3 | 0 | |
|
Country View MH Estates Jackson County |
132 | 5 | 0 | |
|
Milo Academy Douglas County |
124 | 5 | 1 | |
|
Rainbow Rock Village MHP Curry County |
115 | 4 | 0 | |
|
Garden Valley Water Association Coos County |
84 | 7 | 0 | |
|
London Water Co-Op Lane County |
63 | 5 | 3 | |
|
Sumner Water Corporation Coos County |
50 | 10 | 3 | |
|
Coos CO Pks West Laverne Coos County |
40 | 3 | 0 | |
|
Galice Subdivision Water CO Josephine County |
33 | 13 | 3 | |
|
Bend, City of Deschutes County |
77,704 | 2 | 0 | |
|
The Dalles, City of Wasco County |
13,010 | 5 | 1 | |
|
Sweet Home, City of Linn County |
10,322 | 4 | 1 | |
|
Umpqua Basin Water Assoc Douglas County |
9,499 | 4 | 0 | |
|
Scappoose, City of Columbia County |
8,710 | 3 | 0 | |
|
Seaside Water Department Clatsop County |
7,482 | 5 | 0 | |
|
Green Area Water & Sanitary Authority Douglas County |
7,000 | 3 | 0 | |
|
Reedsport, City of Douglas County |
4,836 | 5 | 0 | |
|
Coquille, City of Coos County |
3,953 | 5 | 0 | |
|
Warm Springs Water Treatment Plant Warm Springs · County |
3,800 | 16 | 5 | |
|
Gold Beach, City of Curry County |
3,000 | 5 | 0 | |
|
SW Lincoln CO Water Pud Lincoln County |
3,000 | 7 | 0 | |
|
Youngs River Lewis & Clark WD Clatsop County |
2,580 | 7 | 0 | |
|
Rogue River, City of Jackson County |
2,345 | 3 | 0 | |
|
Vernonia, City of Columbia County |
2,100 | 6 | 1 | |
|
Oprd Cape Lookout State Park Tillamook County |
2,005 | 3 | 0 | |
|
City of Rainier Columbia County |
1,932 | 8 | 0 | |
|
Amity, City of Yamhill County |
1,810 | 6 | 0 | |
|
Netarts Water District Tillamook County |
1,800 | 3 | 0 | |
|
Oprd Oswald West State Park Tillamook County |
1,708 | 3 | 0 | |
|
Canyonville, City of Douglas County |
1,662 | 6 | 0 | |
|
Wickiup Water District Clatsop County |
1,630 | 5 | 0 | |
|
Hillsboro-Cherry Grove Washington County |
1,628 | 3 | 0 | |
|
Glide Water Association Douglas County |
1,523 | 2 | 0 | |
|
Colton Water District Clackamas County |
1,500 | 4 | 0 | |
|
Depoe Bay, City of Lincoln County |
1,398 | 3 | 0 | |
|
Gold Hill, City of Jackson County |
1,335 | 3 | 0 | |
|
Lyons Mehama Water District Linn County |
1,300 | 6 | 0 | |
|
Lowell, City of Lane County |
1,264 | 3 | 0 | |
|
Siletz, City of Lincoln County |
1,235 | 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.