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 |
|---|---|---|---|---|
|
Four Bar C Farms Fresno County |
39 | 2 | 0 | |
|
Sierra Outdoor School Tuolumne County |
39 | 1 | 0 | |
|
Tamarack Lodge Placer County |
39 | 1 | 0 | |
|
Yosemite Riverside Inn Tuolumne County |
39 | 2 | 0 | |
|
J G Boswell Tomato Company LLC Kern County |
38 | 1 | 0 | |
|
Oxnard Pallet Company Ventura County |
38 | 1 | 0 | |
|
Sandoval MHP County |
38 | 5 | 1 | |
|
Yosemite Alpine Csd Mariposa County |
38 | 1 | 0 | |
|
Indian Hills Camp San Diego County |
36 | 2 | 0 | |
|
Gleanings for the Hungry Tulare County |
35 | 4 | 1 | |
|
Oku Incorporated San Mateo County |
35 | 3 | 2 | |
|
Pit River Chimney Rock County |
35 | 4 | 0 | |
|
Snow Valley Mountain Resort San Bernardino County |
35 | 2 | 0 | |
|
V & P Trailer Court Water System San Joaquin County |
35 | 2 | 0 | |
|
Wiebe Farms Tulare County |
35 | 2 | 0 | |
|
Camp Chilnualna Water System Mariposa County |
34 | 1 | 0 | |
|
Chinese Camp School Tuolumne County |
34 | 1 | 0 | |
|
Madrona Manor Sonoma County |
34 | 2 | 0 | |
|
Sherman Island Marina Sacramento County |
34 | 1 | 0 | |
|
Palomar Christian Conference Center San Diego County |
33 | 1 | 0 | |
|
Cypress Canyon Water System Kern County |
32 | 2 | 1 | |
|
San Gregorio Company San Mateo County |
32 | 1 | 0 | |
|
South Kern Mutual Water Company Kern County |
32 | 4 | 1 | |
|
Sunnyslope Campgrounds Fresno County |
32 | 1 | 0 | |
|
Warner Springs Ranch Resort LLC San Diego County |
32 | 2 | 1 | |
|
Buck Meadows Lodge-Yosemite Westgate Mariposa County |
31 | 1 | 0 | |
|
Rancho Seco Ngs (smud) Sacramento County |
31 | 1 | 0 | |
|
Arellano MHP County |
30 | 1 | 0 | |
|
Cardoza Villa Corp San Joaquin County |
30 | 2 | 1 | |
|
Coarsegold Inn Madera County |
30 | 2 | 0 | |
|
Crew Wine Company Yolo County |
30 | 3 | 1 | |
|
Doyle Payless Shell Lassen County |
30 | 1 | 0 | |
|
Dream Catcher Campground Plumas County |
30 | 1 | 0 | |
|
Desert Rose MHP County |
30 | 1 | 0 | |
|
Evergreen Lodge Tuolumne County |
30 | 2 | 0 | |
|
Grumpy Bears Retreat Tulare County |
30 | 1 | 0 | |
|
Huntington Lake Resort Fresno County |
30 | 2 | 0 | |
|
Klamath Basin National Wildlife Refuge Siskiyou County |
30 | 1 | 0 | |
|
Larsen Ranch 39-40/water System San Joaquin County |
30 | 4 | 3 | |
|
La Cienega MHP County |
30 | 2 | 1 | |
|
Mount Whitney Golf Club Inyo County |
30 | 1 | 0 | |
|
Pelligrini Properties (el Campo Market) Merced County |
30 | 1 | 0 | |
|
Pnf Spanish Creek CG Plumas County |
30 | 1 | 0 | |
|
Pnf Whitehorse CG Plumas County |
30 | 1 | 0 | |
|
Sacred Mountain Inn San Diego County |
30 | 1 | 0 | |
|
San Ysidro Health Mhfm San Diego County |
30 | 1 | 0 | |
|
Sidewinder Chevron Imperial County |
30 | 1 | 0 | |
|
Spicer Meadow Campground Tuolumne County |
30 | 1 | 0 | |
|
Station House Inn El Dorado County |
30 | 2 | 0 | |
|
Yolo Fruit Stand Water Yolo County |
30 | 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.