E. coli (Escherichia coli) violations in Arizona
38 active public water systems in Arizona had a E. coli (Escherichia coli) violation in the past three years, 38 of them in the latest quarter of EPA's data. What E. coli (Escherichia coli) is and why it matters.
Systems with a E. coli (Escherichia coli) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Pima Utilities Chandler · Maricopa County |
20,000 | 7 | 3 | |
|
Benson, City of Water System Benson · Cochise County |
5,355 | 3 | 1 | |
|
Polacca First Mesa Consolidated Villages · County |
3,890 | 6 | 4 | |
|
AZ State Prison Geo Group Kingman Kingman · Mohave County |
3,500 | 3 | 1 | |
|
Bisbee Douglas Intl Airport Bisbee · Cochise County |
1,700 | 3 | 1 | |
|
Alpine Dwid Alpine · Apache County |
1,320 | 1 | 0 | |
|
Hopi High School Bia Hopi High School · County |
1,005 | 11 | 4 | |
|
Aguila Water Service Aguila · Maricopa County |
995 | 3 | 2 | |
|
Elfrida Wid Elfrida · Cochise County |
800 | 6 | 0 | |
|
Greasewood Springs Community Boarding School Bia Lower Greasewood · County |
720 | 7 | 3 | |
|
Kingman Stopping Center Kingman · Mohave County |
650 | 7 | 0 | |
|
Lower Moencopi Spring Source Lower Moencopi · County |
465 | 12 | 3 | |
|
Town & Country Preston Nogales · Santa Cruz County |
430 | 6 | 5 | |
|
Littlefield Unified School District 9 Beaver Dam · Mohave County |
400 | 4 | 2 | |
|
Dragoon Water Company Dragoon · Cochise County |
286 | 1 | 1 | |
|
Sleepy Hollow RV County |
207 | 6 | 5 | |
|
Usfs Tnf Cholla Campground Cholla Campground · Gila County |
200 | 4 | 1 | |
|
Usfs Tnf Tortilla Campground Tortilla Flat · Maricopa County |
200 | 4 | 2 | |
|
Usfs Tnf Ponderosa Campground Tonto Village · Gila County |
180 | 3 | 1 | |
|
Kinlichee Community School Bia Kinlichee · County |
174 | 5 | 2 | |
|
Ellison Creek Cabin Owners' Association Payson · Gila County |
159 | 4 | 2 | |
|
Usfs Tnf Burnt Corral Apache Lake · Maricopa County |
140 | 4 | 2 | |
|
Sun Shiners MHP Beaver Dam · Mohave County |
136 | 4 | 2 | |
|
Faithful Pines Lds Camp Alpine · Apache County |
125 | 3 | 1 | |
|
AZ State Pks Tonto Natural Bridge Spr Payson · Gila County |
100 | 2 | 2 | |
|
Tal WI WI Water Users Alpine · Apache County |
84 | 3 | 1 | |
|
Trujillo Trail Dwid Tubac · Santa Cruz County |
78 | 3 | 0 | |
|
Outpost Trailer Park Alpine · Apache County |
68 | 3 | 2 | |
|
Usfs Tnf Sharp Creek Christopher Creek · Gila County |
50 | 3 | 1 | |
|
Tombstone Territories RV Huachuca City · Cochise County |
45 | 1 | 1 | |
|
Usfs Cnf Douglas Ranger Station Douglas · Cochise County |
45 | 2 | 0 | |
|
Cup of Gold Water Company Sedona · Yavapai County |
42 | 1 | 1 | |
|
LA Costa Water Users Assoc Douglas · Cochise County |
30 | 2 | 1 | |
|
Kirkland Bar and Steakhouse Kirkland · Yavapai County |
25 | 3 | 1 | |
|
Mexican Water Trading Post Mexican Water · County |
25 | 3 | 3 | |
|
Transwestern Pipeline Company Klagetoh 4 Klagetoh · County |
25 | 1 | 1 | |
|
Usfs Knf Big Springs Jacob Lake · Coconino County |
25 | 4 | 2 | |
|
Diamond Mountain Retreat Bowie · Cochise County |
23 | 1 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved E. coli (Escherichia coli), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not E. coli (Escherichia coli) 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.