Revised Total Coliform Rule (RTCR) violations in Arizona
493 active public water systems in Arizona had a Revised Total Coliform Rule (RTCR) violation in the past three years, 204 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 |
|---|---|---|---|---|
|
Green Valley MHP Camp Verde · Yavapai County |
190 | 5 | 2 | |
|
Calportland Rillito Cement Plant Rillito · Pima County |
184 | 4 | 2 | |
|
Sweetwater Ranch Town of Taylor Taylor · Navajo County |
180 | 4 | 3 | |
|
Hunters Point Boarding School Bia Hunters Point · County |
173 | 7 | 1 | |
|
Kino Ranch 2 Nogales · Santa Cruz County |
173 | 4 | 0 | |
|
Sonoita Valley (south) Water Company Sonoita · Santa Cruz County |
172 | 4 | 2 | |
|
Rillito Water Users Assoc Rillito · Pima County |
165 | 4 | 2 | |
|
Western Refining Speedway 2962 Sierra Vista · Cochise County |
162 | 2 | 2 | |
|
Desert Pueblo RV Resort Bouse · La Paz County |
160 | 1 | 0 | |
|
Sierra Vista RV Park Casa Grande · Pinal County |
160 | 4 | 0 | |
|
Tall Pines Estates Water Mormon Lake · Coconino County |
156 | 1 | 0 | |
|
Caballo Loco Ranch Sasabe · Pima County |
150 | 3 | 1 | |
|
Monte Vista Water Company Douglas · Cochise County |
150 | 8 | 1 | |
|
Cienega Springs Parker · La Paz County |
146 | 3 | 0 | |
|
Valley View MHC & RV Park Duncan · Greenlee County |
142 | 5 | 0 | |
|
Kohls Ranch Water Company Kohls Ranch · Gila County |
141 | 9 | 2 | |
|
Usfs Tnf Burnt Corral Apache Lake · Maricopa County |
140 | 4 | 2 | |
|
Apache Mobile Home and RV Park, LLC Globe · Gila County |
130 | 6 | 2 | |
|
Yosemite Meats Holbrook · Navajo County |
130 | 3 | 0 | |
|
RV Pit Stop Rvp Quartzsite · La Paz County |
130 | 1 | 0 | |
|
Bonita Public School Willcox · Graham County |
128 | 6 | 3 | |
|
Faithful Pines Lds Camp Alpine · Apache County |
125 | 3 | 1 | |
|
Lagoon Estates WC Unit 2 Fort Valley · Mohave County |
125 | 4 | 0 | |
|
Triangle Y Ranch Camp Oracle · Pinal County |
125 | 2 | 1 | |
|
Pine Springs Day School Bia Houck, North Of · County |
122 | 4 | 2 | |
|
Sunrise Resort at Page Springs Page Springs · Yavapai County |
120 | 2 | 1 | |
|
Arcosanti Camp Mayer · Yavapai County |
115 | 4 | 0 | |
|
Cienega Water Company INC Parker · La Paz County |
108 | 8 | 2 | |
|
Avalon Gardens Water System Tubac · Santa Cruz County |
100 | 2 | 2 | |
|
AZ State Parks Lyman Lake Saint Johns · Apache County |
100 | 2 | 0 | |
|
Beaver Creek Store Beaver Creek · Yavapai County |
100 | 5 | 3 | |
|
Central AZ College Aravaipa Winkelman · Pinal County |
100 | 3 | 1 | |
|
Coolidge Florence Elks Lodge 2350 Florence · Pinal County |
100 | 2 | 0 | |
|
Holbrook Sda Indian School Holbrook · Navajo County |
100 | 5 | 0 | |
|
Lake Roosevelt Water Plant Roosevelt · Gila County |
100 | 4 | 1 | |
|
Parcel 1 Water Amado · Santa Cruz County |
100 | 1 | 1 | |
|
Pcnr Picture Rocks Tucson · Pima County |
100 | 1 | 0 | |
|
Phoenix City of SR85 Landfill Phoenix · Maricopa County |
100 | 3 | 0 | |
|
Sunrise Resorts Clints Well Clints Well · Coconino County |
100 | 3 | 0 | |
|
Signal Peak Water Company Coolidge · Pinal County |
99 | 4 | 0 | |
|
Usfs Conf Pinegrove Camp Flagstaff · Coconino County |
97 | 3 | 1 | |
|
Averys Springerville · Apache County |
90 | 4 | 1 | |
|
Desert Paradise MHP LLC Tubac · Pima County |
90 | 5 | 2 | |
|
Tonto Basin School District 33 Punkin Center · Gila County |
90 | 6 | 2 | |
|
Usfs Asnf Black Mesa Ranger District Overgaard · Navajo County |
87 | 1 | 0 | |
|
Pine Flats HOA Oak Creek Canyon · Coconino County |
85 | 1 | 0 | |
|
Diamond Point Summer Homes Assoc Unknown · Gila County |
84 | 1 | 1 | |
|
Castle Hot Springs Resort Morristown · Yavapai County |
80 | 2 | 2 | |
|
Trujillo Trail Dwid Tubac · Santa Cruz County |
78 | 3 | 0 | |
|
Valle Verde Water Company West Nogales · Santa Cruz County |
74 | 3 | 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 Arizona 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.