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 |
|---|---|---|---|---|
|
Hayden Town of Hayden · Gila County |
517 | 6 | 2 | |
|
CS Christopher Creek Haven Christopher Creek · Gila County |
497 | 3 | 0 | |
|
Loves Travel Stop NO 722 Mayer · Yavapai County |
475 | 4 | 1 | |
|
Coronado Elementary Coranado School · Cochise County |
446 | 1 | 1 | |
|
Jerome Town of Jerome · Yavapai County |
440 | 2 | 0 | |
|
Cactus Country RV Resort Tucson · Pima County |
420 | 3 | 1 | |
|
Valle Escondido Maricopa · Pinal County |
405 | 7 | 0 | |
|
CS EL Prado Water Company Yuma · Yuma County |
404 | 5 | 0 | |
|
Shonto Ntua Shonto · County |
397 | 2 | 2 | |
|
Round Rock Elementary School Round Rock · County |
396 | 2 | 1 | |
|
Sky HI Dwid Pinetop · Navajo County |
390 | 6 | 4 | |
|
Wonderland Acres Dwid Lakeside · Navajo County |
380 | 8 | 4 | |
|
Camp Navajo Bellemont · Coconino County |
350 | 4 | 1 | |
|
CS Flagstaff Ranch Water Company Flagstaff · Coconino County |
350 | 7 | 2 | |
|
Gowan Milling LLC Yuma · Yuma County |
350 | 7 | 1 | |
|
Mormon Lake Lodge Mormon Lake Lodge · Coconino County |
350 | 2 | 1 | |
|
Rough Rock Community High School Bia Rough Rock · County |
350 | 4 | 2 | |
|
Ganado Mission Sage Memorial Hospital Ganado · County |
349 | 2 | 1 | |
|
Low Mountain Boarding School Bia Low Mountain · County |
339 | 3 | 2 | |
|
Tucson Racquet & Fitness Club Tucson · Pima County |
330 | 3 | 1 | |
|
Cocopah West County |
325 | 2 | 0 | |
|
CS Mormon Lake-Upper Village Mormon Lake · Coconino County |
324 | 2 | 1 | |
|
Porter Mountain Dwid Lakeside · Navajo County |
322 | 6 | 2 | |
|
Heber Lds Youth Camp Heber · Navajo County |
300 | 1 | 0 | |
|
Usfs Asnf Canyon Point Campground Overgaard · Coconino County |
300 | 1 | 0 | |
|
Verde River RV Resort & Cottages Camp Verde · Yavapai County |
300 | 2 | 1 | |
|
Mesaland Water Company Tucson · Pima County |
294 | 5 | 1 | |
|
Cocopah East County |
280 | 3 | 0 | |
|
Long House Valley Ntua Long House Valley, West Of Kayenta · County |
277 | 2 | 2 | |
|
Ak-Chin Southern Dunes Golf Club County |
270 | 3 | 0 | |
|
Little Park Water Company Oak Creek Canyon · Yavapai County |
264 | 6 | 4 | |
|
Cordes Junction Motel RV Park Cordes Junction · Yavapai County |
250 | 3 | 1 | |
|
Porter Creek Dwid Lakeside · Navajo County |
250 | 7 | 4 | |
|
Rocky Ridge Boarding School Bia Dinnebito · County |
250 | 4 | 3 | |
|
Springs of Living Water Prescott · Yavapai County |
250 | 3 | 0 | |
|
Seba Dalkai Boarding School Bia Seba Dalkai · County |
250 | 4 | 2 | |
|
Coldwater Canyon 2 Black Canyon City · Yavapai County |
245 | 2 | 0 | |
|
Usda Tnf Grapevine Group Water System Grapevine · Gila County |
241 | 4 | 0 | |
|
Scua Skill Center County |
234 | 3 | 1 | |
|
Forest Lake Ntua Forest Lake · County |
233 | 2 | 2 | |
|
Nazlini Community Boarding School Bia Nazlini · County |
230 | 2 | 1 | |
|
Crown King Water Company Crown King · Yavapai County |
220 | 6 | 5 | |
|
Chinle Usd 24 Administration Center Chinle · County |
220 | 5 | 3 | |
|
Sleepy Hollow RV County |
207 | 6 | 5 | |
|
Usfs Asnf Rolfe Hoyer Campground Greer · Apache County |
204 | 2 | 0 | |
|
Latter Day Saints Church Summerhaven · Pima County |
200 | 4 | 1 | |
|
Salome Store La Paz County |
200 | 1 | 0 | |
|
Usfs Asnf Luna Lake CG Alpine · Apache County |
200 | 1 | 0 | |
|
Usfs Tnf Cholla Campground Cholla Campground · Gila County |
200 | 4 | 1 | |
|
White Mountain Lds Camp Vernon · Apache County |
200 | 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.