Groundwater Rule (GWR) violations in Arizona
103 active public water systems in Arizona had a Groundwater Rule (GWR) violation in the past three years, 106 of them in the latest quarter of EPA's data. What Groundwater Rule (GWR) is and why it matters.
Systems with a Groundwater Rule (GWR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Safford City of Safford · Graham County |
20,600 | 5 | 1 | |
|
Wmatua Miner Flat County |
15,570 | 6 | 1 | |
|
Eloy City of Eloy · Pinal County |
8,999 | 6 | 1 | |
|
Scua Upper Seven Mile County |
8,478 | 12 | 3 | |
|
Epcor Tierra del Rio Peoria · Maricopa County |
4,868 | 1 | 0 | |
|
Cordes Lakes Water Company Cordes Lakes · Yavapai County |
4,425 | 1 | 0 | |
|
Golden Shores Water Company Topock · Mohave County |
3,970 | 3 | 1 | |
|
Adoc Eyman Unit Florence · Pinal County |
3,969 | 8 | 2 | |
|
Golden Valley Improvement District Kingman · Mohave County |
3,950 | 2 | 1 | |
|
Polacca First Mesa Consolidated Villages · County |
3,890 | 6 | 4 | |
|
Scua Bylas Bylas · County |
3,160 | 12 | 3 | |
|
Wmatua Cibecue Cibecue · County |
2,590 | 3 | 2 | |
|
Valle Verde Water Company East Nogales · Santa Cruz County |
2,397 | 4 | 0 | |
|
Sunrise Base Lodge County |
2,346 | 3 | 1 | |
|
Thunderbird Farms Dwid Maricopa · Pinal County |
2,315 | 2 | 0 | |
|
Bia San Carlos County |
2,150 | 8 | 1 | |
|
Hotevilla Village Hotevilla, Hotevilla/bacavi Community Sc · County |
1,601 | 8 | 4 | |
|
Cedar Grove Water Company Vernon · Apache County |
1,564 | 2 | 0 | |
|
Joshua Valley Utility Company Meadview · Mohave County |
1,500 | 2 | 0 | |
|
Shungopavi Shungopavi · County |
1,430 | 7 | 3 | |
|
Vwc Buckeye Division Sun Valley Buckeye · Maricopa County |
1,378 | 2 | 0 | |
|
Town of Star Valley Water Department Star Valley · Gila County |
1,157 | 4 | 1 | |
|
Hopi High School Bia Hopi High School · County |
1,005 | 11 | 4 | |
|
Hawley Lake Homes County |
990 | 4 | 2 | |
|
Bacavi Village Bacavi · County |
943 | 3 | 1 | |
|
Maricopa Consolidated Dwid Maricopa · Pinal County |
928 | 4 | 1 | |
|
Havasupai Village Supai · County |
885 | 6 | 2 | |
|
Heber Dwid Heber · Navajo County |
839 | 5 | 2 | |
|
Pinal County Justice Complex Florence · Pinal County |
820 | 6 | 2 | |
|
Elfrida Wid Elfrida · Cochise County |
800 | 6 | 0 | |
|
Marana Dwid Culver Marana · Pima County |
709 | 4 | 1 | |
|
Scua Lower Peridot County |
702 | 7 | 3 | |
|
Newton Water Well Munds Park · Coconino County |
665 | 4 | 1 | |
|
Kingman Stopping Center Kingman · Mohave County |
650 | 7 | 0 | |
|
Scua Beverly Hills County |
612 | 3 | 2 | |
|
Sipaulovi (lower Sipaulovi/lower Mishongnovi) Lower Sipaulovi, Lower Mishongnovi · County |
609 | 5 | 2 | |
|
Main Street Market #640 Ehrenberg · La Paz County |
600 | 4 | 0 | |
|
Mishongnovi (upper Sipaulovi/upper Mishongnovi) Upper Sipaulovi, Upper Mishongnovi · County |
490 | 4 | 1 | |
|
Loves Country Store INC Quartzsite · La Paz County |
475 | 4 | 0 | |
|
Lower Moencopi Spring Source Lower Moencopi · County |
465 | 12 | 3 | |
|
Holbrook Travel Center #246 Holbrook · Navajo County |
450 | 2 | 0 | |
|
Page Springs Vineyard Cornville · Yavapai County |
400 | 2 | 0 | |
|
Pinedale Dwid Pinedale · Navajo County |
376 | 3 | 1 | |
|
Camp Navajo Bellemont · Coconino County |
350 | 4 | 1 | |
|
CS Flagstaff Ranch Water Company Flagstaff · Coconino County |
350 | 7 | 2 | |
|
Scua Lower Peridot Bush County |
342 | 4 | 4 | |
|
Lower Moencopi Consecutive System Lower Moencopi · County |
326 | 6 | 3 | |
|
White Horse Ranch Owners Association Dewey · Yavapai County |
292 | 4 | 1 | |
|
Salome Water Company Salome · La Paz County |
289 | 4 | 1 | |
|
Sun Valley Utilities Sun Valley · Navajo County |
287 | 8 | 3 |
About this data
A system is counted once if any of its violations in the past three years involved Groundwater Rule (GWR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Groundwater Rule (GWR) 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.