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 |
|---|---|---|---|---|
|
Redwood Valley Rancheria County |
152 | 4 | 1 | |
|
Donner Mine Camp INC Nevada County |
151 | 2 | 0 | |
|
Buhach Pentecost Hall Merced County |
150 | 1 | 0 | |
|
Cbuso Dba Woodbridge Winery San Joaquin County |
150 | 1 | 0 | |
|
Gurdwara Gur Nanak Parkash Fresno Fresno County |
150 | 1 | 0 | |
|
Madera Ranchos Assembly of God Madera County |
150 | 1 | 0 | |
|
River's Edge Marina & Resort Sacramento County |
150 | 1 | 0 | |
|
Currier Estates Water Corp San Joaquin County |
148 | 1 | 0 | |
|
Hughson Nut Inc. Livingston Merced County |
146 | 1 | 0 | |
|
Ponderosa Mobile Home Park Tuolumne County |
146 | 2 | 1 | |
|
Bar 717 Ranch Trinity County |
145 | 1 | 0 | |
|
Tahoe Forest Church Nevada County |
145 | 1 | 0 | |
|
Sierra Pacific Industries Tuolumne County |
144 | 1 | 0 | |
|
NS Mini Mart Tulare County |
140 | 1 | 0 | |
|
Sportsmans Paradise Imperial County |
138 | 1 | 0 | |
|
EL Nido Mobile Home Park Merced County |
137 | 1 | 0 | |
|
Wilsona Gardens Mutual Los Angeles County |
136 | 3 | 0 | |
|
Three Rivers Hideaway Tulare County |
135 | 2 | 1 | |
|
Cartago Mutual Water Company Inyo County |
132 | 1 | 0 | |
|
Robbs Resort El Dorado County |
132 | 1 | 0 | |
|
Treasure Creek Woods Mwc Trinity County |
131 | 1 | 0 | |
|
Old River Mutual Water Company Kern County |
130 | 3 | 0 | |
|
Skp Park of the Sierras INC Madera County |
130 | 1 | 0 | |
|
Wilton Bible Church Sacramento County |
130 | 2 | 1 | |
|
Yosemite Terrace Estates Mariposa County |
130 | 2 | 1 | |
|
Sierra Twain Harte MHP Tuolumne County |
129 | 1 | 0 | |
|
Lakeside Sd-Lakeside School Santa Clara County |
127 | 1 | 0 | |
|
Bear River Summer Home Tract Amador County |
126 | 1 | 0 | |
|
Empire Landing Campground-Sundance RV San Bernardino County |
126 | 2 | 0 | |
|
Burnt Ranch School Trinity County |
125 | 3 | 2 | |
|
Legacy Packing and Cold Storage Tulare County |
125 | 3 | 0 | |
|
Matsuda's by Green Acres, LLC Sacramento County |
125 | 3 | 0 | |
|
Packer Lake Lodge Sierra County |
125 | 1 | 0 | |
|
River Reflections RV & Campground Butte County |
125 | 1 | 0 | |
|
Gilbert Street Complex San Bernardino County |
124 | 2 | 1 | |
|
Institute of Mental Physics San Bernardino County |
120 | 3 | 1 | |
|
Las Palmas Mobile Home Park Del Norte County |
120 | 2 | 1 | |
|
Longview Mennonite School Merced County |
120 | 1 | 0 | |
|
Lower Deer Creek Tract Fresno County |
120 | 1 | 0 | |
|
Millers Hill School El Dorado County |
120 | 1 | 0 | |
|
New Auberry Water Association Fresno County |
120 | 3 | 1 | |
|
Yurok Weitchpec County |
120 | 5 | 0 | |
|
Green Meadows Outdoor School Mariposa County |
119 | 1 | 0 | |
|
Page Avenue Mutual Water Company Orange County |
119 | 2 | 0 | |
|
ST Francis Tract Water System Santa Cruz County |
118 | 2 | 0 | |
|
Deer Creek RV Park Tulare County |
114 | 2 | 0 | |
|
Grimmway Farms David Road Kern County |
114 | 2 | 0 | |
|
Yolo CO Airport Yolo County |
114 | 2 | 1 | |
|
Angeles Crest Christian Camp Los Angeles County |
112 | 1 | 0 | |
|
Halfway House Cafe Los Angeles County |
112 | 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.