Revised Total Coliform Rule (RTCR) violations in California
770 active public water systems in California had a Revised Total Coliform Rule (RTCR) violation in the past three years, 100 of them still unresolved. What Revised Total Coliform Rule (RTCR) is and why it matters.
Systems with a Revised Total Coliform Rule (RTCR) violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rubidoux Community SD Riverside County |
38,522 | 1 | 0 | |
|
Viejas Community System Alpine · County |
9,600 | 1 | 0 | |
|
IV Desert Museum Society Inc. Imperial County |
6,110 | 1 | 0 | |
|
Acorn Ridge Casino County |
3,640 | 2 | 1 | |
|
Applewhite Campground San Bernardino County |
3,177 | 1 | 0 | |
|
Tule River Reservation Main Tule River Reservation · County |
2,560 | 9 | 2 | |
|
Riley's Farm San Bernardino County |
2,400 | 1 | 0 | |
|
Redding Rancheria County |
2,015 | 7 | 2 | |
|
Hume Lake Christian Camps, INC Fresno County |
1,519 | 1 | 0 | |
|
Harris Ranch Beef CO Fresno County |
1,009 | 1 | 0 | |
|
Santa Rosa Rancheria Santa Rosa Rancheria · County |
1,000 | 5 | 1 | |
|
Kelly's Market San Bernardino County |
660 | 1 | 0 | |
|
Csa 62 Riverside County |
614 | 1 | 1 | |
|
Santa Ysabel Enterprise System County |
510 | 1 | 0 | |
|
HI Sahara Oasis San Bernardino County |
507 | 1 | 0 | |
|
Alturas Desert Rose Casino Alturas · County |
464 | 2 | 1 | |
|
Caltrans-Salyer Safety Rest Stop Trinity County |
400 | 1 | 0 | |
|
Camp Gilboa San Bernardino County |
300 | 1 | 0 | |
|
DD Mobile Home Park County |
275 | 9 | 3 | |
|
Manny Water System Tulare County |
248 | 2 | 1 | |
|
Larrupin Cafe Humboldt County |
247 | 1 | 1 | |
|
Cacheville Service Dist Yolo County |
239 | 8 | 1 | |
|
Howonquet Community(smith River) Howonquet Community · County |
220 | 5 | 0 | |
|
Emerald Forest Humboldt County |
200 | 1 | 0 | |
|
Forest Lawn Scout Reservation San Bernardino County |
200 | 2 | 0 | |
|
Gordon Acres Water CO San Bernardino County |
200 | 6 | 4 | |
|
Sanford Winery Santa Barbara County |
170 | 1 | 1 | |
|
Crystal Lake Property Owners San Bernardino County |
163 | 2 | 1 | |
|
Thomas Mountain Water Company Riverside County |
157 | 1 | 1 | |
|
Camp Ross Relles Nevada County |
154 | 1 | 0 | |
|
Grindstone Rancheria County |
150 | 9 | 4 | |
|
Four Jeffrey Campground Inyo County |
142 | 1 | 0 | |
|
Northshore RV Resort INC San Bernardino County |
140 | 2 | 0 | |
|
Kern Valley Mutual Water Company Kern County |
132 | 4 | 3 | |
|
Rocky Comfort Mutual Water CO San Bernardino County |
130 | 1 | 0 | |
|
ST Anthony Retreat Center Tulare County |
130 | 1 | 0 | |
|
Trinidad Extended Stay RV Humboldt County |
130 | 1 | 0 | |
|
Cedar Spring Retreat Center Madera County |
122 | 1 | 0 | |
|
Fort Independence Fort Independence Reservation · County |
120 | 5 | 3 | |
|
Round Valley Health Clinic County |
119 | 7 | 3 | |
|
Anza Petroleum INC Riverside County |
115 | 1 | 1 | |
|
Paradise Mobile Estates San Bernardino County |
106 | 1 | 0 | |
|
Fireclay Tile San Benito County |
100 | 1 | 0 | |
|
Omya California, a Division of Omya INC San Bernardino County |
100 | 2 | 1 | |
|
Sac Valley Truck Stop Sacramento County |
100 | 1 | 1 | |
|
San Miguel WS #01 Monterey County |
100 | 2 | 2 | |
|
Teichert Perkins Sacramento County |
100 | 1 | 1 | |
|
Ted's Water System San Bernardino County |
100 | 1 | 0 | |
|
Villa Robles Water System San Benito County |
98 | 3 | 2 | |
|
Pit River Montgomery Creek Rancheria Montgomery Creek Rancheria · County |
90 | 11 | 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 California 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. Retrieved from ECHO on Oct 11, 2026.