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 |
|---|---|---|---|---|
|
Usfs Groveland Ranger Stn. Tuolumne County |
60 | 1 | 0 | |
|
Usfs Lost Claim Tuolumne County |
60 | 1 | 0 | |
|
White Cloud Admin/campground Nevada County |
60 | 1 | 0 | |
|
Yosemite Ridge Resort Mariposa County |
60 | 1 | 0 | |
|
Cdf Oak Glen Conservation Camp San Bernardino County |
59 | 1 | 0 | |
|
Leland Meadow Water District Tuolumne County |
59 | 1 | 0 | |
|
Black Bear Lodge El Dorado County |
58 | 2 | 0 | |
|
Rileys Place San Bernardino County |
58 | 1 | 0 | |
|
The Yubaverse Sierra County |
58 | 1 | 0 | |
|
7180 Hwy 116 LLC Sonoma County |
57 | 1 | 0 | |
|
The Willows Resort Santa Cruz County |
57 | 2 | 1 | |
|
Thomason Tuolumne Rd. Prop (steve's Plac Tuolumne County |
57 | 2 | 0 | |
|
Belk Farms Riverside County |
56 | 2 | 0 | |
|
Lahontan Heights Home. Assoc. Lassen County |
56 | 1 | 0 | |
|
Lotus Store Water System Tahoe City · El Dorado County |
56 | 1 | 0 | |
|
Outward Bound California Mariposa County |
56 | 1 | 0 | |
|
Vajrayana Foundation Santa Cruz County |
56 | 1 | 0 | |
|
Winterhaven Mobile Estates Los Angeles County |
56 | 2 | 0 | |
|
Camp Waterman Mwc San Bernardino County |
55 | 1 | 0 | |
|
Gemperle Egg Ranch Merced County |
55 | 2 | 0 | |
|
Little Baldy Water Los Angeles County |
55 | 2 | 1 | |
|
Mariposa County Public Works Department Mariposa County |
55 | 1 | 0 | |
|
Pinecrest Permittees Assn Tuolumne County |
55 | 2 | 1 | |
|
Riverside Mobile Home Park San Joaquin County |
55 | 1 | 0 | |
|
Valenzuela Water System San Benito County |
55 | 1 | 0 | |
|
Corda RD WS Monterey County |
54 | 3 | 1 | |
|
Modoc Vineyard Academy Modoc County |
53 | 1 | 0 | |
|
Sullivan Mutual Water Santa Clara County |
53 | 2 | 1 | |
|
Gibson's Roadhouse Cafe Amador County |
52 | 2 | 0 | |
|
Neu Lodge Motel Shasta County |
52 | 1 | 0 | |
|
Paicines Ranch San Benito County |
52 | 2 | 1 | |
|
Sosas Water System San Bernardino County |
52 | 1 | 0 | |
|
Enchanted Valley Santa Cruz County |
51 | 1 | 0 | |
|
Francis Property Management Butte County |
51 | 2 | 1 | |
|
Klamath River RV Park Del Norte County |
51 | 1 | 0 | |
|
Occidental Arts & Ecology Center Sonoma County |
51 | 2 | 1 | |
|
Usfs Cherry Valley Campgd Tuolumne County |
51 | 1 | 0 | |
|
Angelique Maelee Properties County |
50 | 8 | 1 | |
|
Burney Falls Resort Shasta County |
50 | 1 | 0 | |
|
California Hot Springs Water Company Tulare County |
50 | 3 | 0 | |
|
Castle Mountain Mine San Bernardino County |
50 | 3 | 1 | |
|
Cow Creek Permittees Association Tuolumne County |
50 | 1 | 0 | |
|
Dillard Store (sws) Sacramento County |
50 | 1 | 0 | |
|
Element 79 Vineyards El Dorado County |
50 | 1 | 0 | |
|
Fremont Diner Sonoma County |
50 | 1 | 0 | |
|
Italian Athletic Club San Joaquin County |
50 | 1 | 0 | |
|
Marquez Rental Madera County |
50 | 2 | 0 | |
|
Mount Madonna Center Santa Cruz County |
50 | 1 | 0 | |
|
Ocotillo Wells Svra HQ San Diego County |
50 | 1 | 0 | |
|
Pnf Boulder / Lone Creek Cgs Plumas County |
50 | 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 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.