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 |
|---|---|---|---|---|
|
Madera CO Cmd19-Parkwood Madera County |
1,637 | 1 | 0 | |
|
Mojave River Forks Regional Park San Bernardino County |
1,356 | 1 | 0 | |
|
McCloud C.s.d. Siskiyou County |
1,317 | 3 | 2 | |
|
Caltrans Shandon Rest Stop San Luis Obispo County |
1,300 | 1 | 0 | |
|
California Village County |
1,290 | 5 | 2 | |
|
Sea Ranch Water Company,the (puc) Sonoma County |
1,287 | 3 | 1 | |
|
Redway C.s.d. Humboldt County |
1,207 | 2 | 0 | |
|
Malaga County Water District Fresno County |
1,200 | 2 | 1 | |
|
Shant Bhavan Punjabi Funeral Home Fresno · Fresno County |
1,200 | 1 | 0 | |
|
Blue Lake, City of Blue Lake · Humboldt County |
1,172 | 1 | 0 | |
|
Phoenix Lake Estates CC Mwc Tuolumne County |
1,168 | 1 | 0 | |
|
Sonora Meadows Mutual Wtr CO Tuolumne County |
1,123 | 2 | 1 | |
|
MI Wuk Village Mut Wtr CO Tuolumne County |
1,076 | 1 | 0 | |
|
Trinidad, City of Trinidad · Humboldt County |
1,072 | 2 | 1 | |
|
Caltrans-Trinidad NB Humboldt County |
1,000 | 1 | 0 | |
|
Henningsen Lotus Park Water System El Dorado County |
1,000 | 2 | 0 | |
|
Rasor Road Service San Bernardino County |
1,000 | 1 | 0 | |
|
Nyeland Acres Mutual Water CO Ventura County |
975 | 2 | 0 | |
|
Rancho Seco Park Sacramento County |
968 | 1 | 0 | |
|
Fcwwd 18/friant Fresno County |
909 | 1 | 0 | |
|
Madison Service Dist Yolo County |
876 | 8 | 1 | |
|
Camp Lotus Water System El Dorado County |
850 | 1 | 0 | |
|
William Heise County Park San Diego County |
850 | 1 | 0 | |
|
Tud-Apple Valley Estates Tuolumne County |
829 | 1 | 0 | |
|
Immanuel Sports Complex Fresno County |
804 | 1 | 0 | |
|
Church of Jesus Christ of Lds (sws) Sacramento County |
800 | 1 | 0 | |
|
Daggett Comm Svcs Dist San Bernardino County |
795 | 3 | 1 | |
|
Foothill Elementary School Fresno County |
750 | 2 | 1 | |
|
High Valleys Water District Riverside County |
733 | 3 | 1 | |
|
Plasse's Resort Amador County |
730 | 1 | 0 | |
|
Sierra Csa #5, Sierra Brooks Sierra County |
726 | 1 | 0 | |
|
Berryessa Highlands Napa County |
715 | 1 | 0 | |
|
Rainbo Beach San Bernardino County |
700 | 2 | 0 | |
|
Scotia Csd Humboldt County |
681 | 4 | 1 | |
|
Lake Morena's Oak Shores Mwc San Diego County |
670 | 2 | 1 | |
|
Brandeis Bardin Institute Ventura County |
665 | 2 | 1 | |
|
Edwards Afb Main Base Kern County |
661 | 2 | 0 | |
|
Grizzly Lake Csd-Delleker Plumas County |
657 | 2 | 0 | |
|
Cdfw Elkhorn Slough Ecological Reserve Monterey County |
650 | 1 | 0 | |
|
Mesquite Creek County |
650 | 5 | 1 | |
|
Orleans C.s.d. Humboldt County |
636 | 4 | 3 | |
|
Usfs Clark Fork Campd Tuolumne County |
612 | 1 | 0 | |
|
Carver Tract Mutual Water Comp Riverside County |
600 | 2 | 1 | |
|
Country Life MH & RV Park Imperial County |
600 | 2 | 1 | |
|
Grand Island Mansion Sacramento County |
600 | 1 | 0 | |
|
Rancho Sespe Workers Imp Assoc Ventura County |
600 | 1 | 0 | |
|
Sierra Highland Csd Inyo County |
600 | 1 | 0 | |
|
Bear River Lake Resort Amador County |
571 | 2 | 0 | |
|
Juvenile Justice Campus Fresno County |
565 | 1 | 0 | |
|
Meadows Union Elementary School Imperial County |
550 | 4 | 2 |
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.