Arsenic violations in Arizona
105 active public water systems in Arizona had a Arsenic violation in the past three years, 26 of them in the latest quarter of EPA's data. What Arsenic is and why it matters.
Health effects: Long-term arsenic exposure increases risk of bladder, lung, and skin cancers. It is also associated with cardiovascular disease, type 2 diabetes, and developmental effects in children. Arsenic is classified as a Group A human carcinogen by the EPA.
Systems with a Arsenic violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sweetwater Ntua Sweetwater, Red Mesa · County |
2,014 | 3 | 1 | |
|
Abra Water Company Paulden · Yavapai County |
1,932 | 4 | 0 | |
|
Gila Bend Town of Buckeye · Maricopa County |
1,922 | 7 | 0 | |
|
Forest Lakes Water Improvement District Heber · Coconino County |
1,746 | 3 | 0 | |
|
Pomerene Dwid Pomerene · Cochise County |
1,618 | 5 | 0 | |
|
San Xavier West San Xavier West · County |
1,511 | 2 | 0 | |
|
Cottonwood Municipal Water VV3 Cottonwood · Yavapai County |
1,450 | 2 | 0 | |
|
Shungopavi Shungopavi · County |
1,430 | 7 | 3 | |
|
Cameron Trading Post Cameron · Coconino County |
1,270 | 8 | 1 | |
|
Hopi High School Bia Hopi High School · County |
1,005 | 11 | 4 | |
|
Havasupai Village Supai · County |
885 | 6 | 2 | |
|
Sierra Pacific Mobile Manor Yuma · Yuma County |
816 | 6 | 0 | |
|
Liberty Elementary School Buckeye · Maricopa County |
775 | 5 | 0 | |
|
Adaman Mutual Water Company Adaman · Maricopa County |
700 | 8 | 1 | |
|
Kingman Stopping Center Kingman · Mohave County |
650 | 7 | 0 | |
|
Appaloosa Water Company Chino Valley · Yavapai County |
600 | 5 | 2 | |
|
Coldwater Canyon 1 Black Canyon City · Yavapai County |
541 | 1 | 0 | |
|
Desert Gardens RV Resort Co-Op, INC Florence · Pinal County |
532 | 2 | 0 | |
|
Orangewood Mobile Home Park Phoenix · Maricopa County |
500 | 1 | 0 | |
|
Dilcon Community Boarding School Bia Dilcon · County |
473 | 5 | 1 | |
|
Lower Moencopi Spring Source Lower Moencopi · County |
465 | 12 | 3 | |
|
Valle Escondido Maricopa · Pinal County |
405 | 7 | 0 | |
|
Krazy K RV Park Camp Verde · Yavapai County |
380 | 3 | 1 | |
|
Hickmans Egg Ranch Buckeye · Maricopa County |
376 | 5 | 0 | |
|
CS Flagstaff Ranch Water Company Flagstaff · Coconino County |
350 | 7 | 2 | |
|
Federal Correctional Inst Tucson · Pima County |
350 | 9 | 0 | |
|
Rough Rock Community High School Bia Rough Rock · County |
350 | 4 | 2 | |
|
CS White Hills Water Company Unit 1 White Hills · Mohave County |
338 | 4 | 0 | |
|
Dateland Public Service CO Dateland · Yuma County |
319 | 6 | 0 | |
|
Quail Run Water System Globe · Gila County |
300 | 1 | 0 | |
|
Valle Verde del Norte Green Valley · Pima County |
300 | 4 | 1 | |
|
Verde Valley Manor Cottonwood · Yavapai County |
275 | 2 | 0 | |
|
Rio Viejo Water Tucson · Pima County |
272 | 2 | 0 | |
|
Ak-Chin Southern Dunes Golf Club County |
270 | 3 | 0 | |
|
Rio Mercado Water Tucson · Pima County |
266 | 5 | 0 | |
|
CS Water Company Desert Hills · Mohave County |
258 | 2 | 0 | |
|
Second Mesa Day School Bia County |
255 | 6 | 1 | |
|
Coldwater Canyon 2 Black Canyon City · Yavapai County |
245 | 2 | 0 | |
|
Hickmans Egg Ranch Tonopah Tonopah · Maricopa County |
235 | 5 | 1 | |
|
CS West Village Water Company Flagstaff · Coconino County |
210 | 7 | 0 | |
|
Quail Ridge Dwid Chino Valley · Yavapai County |
179 | 2 | 0 | |
|
Sierra Vista RV Park Casa Grande · Pinal County |
160 | 4 | 0 | |
|
Monte Vista Water Company Douglas · Cochise County |
150 | 8 | 1 | |
|
Town of Camp Verde Verde River Estates Camp Verde · Yavapai County |
150 | 1 | 0 | |
|
Acme Water Blue Hills Cottonwood · Yavapai County |
138 | 1 | 0 | |
|
Ranch Water Service INC Kingman · Mohave County |
135 | 7 | 1 | |
|
Coldwater Canyon 3 Black Canyon City · Yavapai County |
127 | 2 | 0 | |
|
Hopeville Water System Buckeye · Maricopa County |
89 | 3 | 0 | |
|
Parkside Community Church Camp Verde · Yavapai County |
88 | 3 | 0 | |
|
Two Tanks Community Well Surprise · Maricopa County |
76 | 6 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Arsenic, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Arsenic 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.