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 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 |
|---|---|---|---|---|
|
Purina Mills INC Stanislaus County |
25 | 1 | 0 | |
|
San Benito County Historical Park San Benito County |
25 | 1 | 0 | |
|
Shop-N-Quick #2 Fresno County |
25 | 1 | 0 | |
|
Sierra Inn Fresno County |
25 | 1 | 0 | |
|
Silverfork School El Dorado County |
25 | 8 | 0 | |
|
Sjrp Owl Hollow Fresno County |
25 | 1 | 0 | |
|
Slash X Ranch Cafe San Bernardino County |
25 | 1 | 0 | |
|
Swanton Berry Farm Santa Cruz County |
25 | 1 | 0 | |
|
Taber Ranch Event Center & Vineyard Yolo County |
25 | 1 | 0 | |
|
The Maples Yolo County |
25 | 1 | 0 | |
|
Tract 1199 Water System Fresno County |
25 | 3 | 2 | |
|
Turner Road Vintners (west) San Joaquin County |
25 | 1 | 0 | |
|
Valhalla Water Association Los Angeles County |
25 | 1 | 0 | |
|
Rainbow Tract Water Assoc El Dorado County |
23 | 1 | 0 | |
|
Sivananda Yoga Farm Nevada County |
23 | 1 | 0 | |
|
Sierra Village Mobile Home Park Tuolumne County |
21 | 2 | 1 | |
|
Robinson's Corner MHP Butte County |
20 | 8 | 2 | |
|
Thousand Trails San Benito Preserve San Benito County |
17 | 1 | 0 | |
|
Thousand Trails Morgan Hill Santa Clara County |
13 | 1 | 0 | |
|
Foothill Municipal Water Dist. Los Angeles County |
0 | 2 | 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.