Revised Total Coliform Rule (RTCR) violations in Washington
845 active public water systems in Washington had a Revised Total Coliform Rule (RTCR) violation in the past three years, 133 of them in the latest quarter of EPA's data. What Revised Total Coliform Rule (RTCR) is and why it matters.
Systems with a Revised Total Coliform Rule (RTCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lake Alyson Snohomish County |
463 | 1 | 0 | |
|
Wolf Den Restaurant Wapato · County |
462 | 1 | 0 | |
|
Dugualla Community INC Island County |
459 | 4 | 0 | |
|
Wandering Creek Homeowners Assoc Snohomish County |
457 | 2 | 0 | |
|
Black Diamond Water District Clallam County |
452 | 3 | 0 | |
|
Finley Elementary School (new) Benton County |
450 | 3 | 0 | |
|
Maple Lane Behavioral Health Thurston County |
450 | 3 | 0 | |
|
Pioneer Water Company Spokane County |
443 | 4 | 0 | |
|
Craven Farm Water System Snohomish County |
431 | 1 | 0 | |
|
Riverside Town of Okanogan County |
429 | 5 | 1 | |
|
Deming Log Show & RV Whatcom County |
407 | 2 | 0 | |
|
Paradise Estates Mason County |
403 | 2 | 0 | |
|
Wsdp MT Spokane State Park #6 Spokane County |
403 | 1 | 0 | |
|
Port of Allyn Mason County |
397 | 3 | 0 | |
|
Sun Mountain Resort Okanogan County |
376 | 2 | 0 | |
|
Cuyamaca Olympia · County |
375 | 7 | 0 | |
|
Quinault River Inn Lake Quinault · County |
370 | 2 | 0 | |
|
Whatcom Meadows Whatcom County |
370 | 1 | 0 | |
|
JR Simplot CO Grant County |
365 | 1 | 0 | |
|
Golden Plains MHP #1 Adams County |
360 | 2 | 0 | |
|
Wsdp Riverside SP Equestrian Spokane County |
356 | 1 | 0 | |
|
Greenwood Mobile Home Park Grays Harbor County |
350 | 2 | 0 | |
|
Quilcene School District 48 Jefferson County |
350 | 1 | 0 | |
|
Creston Public Water Lincoln County |
348 | 1 | 0 | |
|
Smokiam RV Resort Grant County |
343 | 2 | 0 | |
|
Keller Mallott · County |
340 | 10 | 0 | |
|
Skyline Mobile Home Park Yakima County |
340 | 2 | 0 | |
|
Corral Springs Water System Douglas County |
336 | 1 | 0 | |
|
Kalispel Usk · County |
330 | 7 | 0 | |
|
River Bluff Water System Spokane County |
330 | 2 | 0 | |
|
McCoy Lake Wellpinit · County |
325 | 6 | 2 | |
|
Campbell Farm Wapato · County |
320 | 3 | 1 | |
|
West Mesa Domestic Water Assn Franklin County |
316 | 2 | 0 | |
|
Springdale Town of Stevens County |
315 | 3 | 0 | |
|
Cowlitz Food and Fuel Lewis County |
312 | 1 | 0 | |
|
Wanapum Village Grant County |
305 | 1 | 0 | |
|
Gifford Campground Stevens County |
304 | 1 | 0 | |
|
Theodore Hoss Sports Complex Thurston County |
304 | 1 | 0 | |
|
Artesian Water District 8 Walla Walla County |
302 | 4 | 0 | |
|
Homestead Manufactured Housing Benton County |
300 | 2 | 0 | |
|
Martha Boardman Wellpinit · County |
295 | 6 | 0 | |
|
South Kitsap Little League Kitsap County |
293 | 1 | 0 | |
|
Yakima Training Center Pomona Yakima County |
280 | 1 | 0 | |
|
Perry Lewis County |
277 | 4 | 1 | |
|
Rocky River Road Community Site Nespelem · County |
260 | 8 | 0 | |
|
Tamoshan Thurston County |
260 | 1 | 0 | |
|
Foothills Community Church Spokane County |
258 | 1 | 0 | |
|
Grapeview School Mason County |
257 | 1 | 0 | |
|
Pilaguamish Community Club Snohomish County |
255 | 1 | 0 | |
|
Eagle Harbor Marina Kitsap County |
254 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Revised Total Coliform Rule (RTCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Revised Total Coliform Rule (RTCR) 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 Washington 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.