Nitrate violations in Arizona
210 active public water systems in Arizona had a Nitrate violation in the past three years, 24 of them in the latest quarter of EPA's data. What Nitrate is and why it matters.
Health effects: Methemoglobinemia in infants under 6 months: gut bacteria convert nitrate to nitrite, which blocks oxygen transport in blood. Pregnant women should also take precautions. Chronic adult exposure at elevated levels may increase cancer risk.
Systems with a Nitrate violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Settlin Inn RV Park Golden Valley · Mohave County |
100 | 2 | 0 | |
|
Usfs Conf Rock Crossing Happy Jack · Coconino County |
100 | 2 | 1 | |
|
Usmc Air Station Cannon Complex Yuma · Yuma County |
100 | 3 | 0 | |
|
Wisdom Cafe Tumacacori · Santa Cruz County |
100 | 3 | 0 | |
|
Usfs Conf Pinegrove Camp Flagstaff · Coconino County |
97 | 3 | 1 | |
|
Moccasin Domestic Water Improvement District Moccasin · County |
96 | 5 | 0 | |
|
Chimney Estates Mayer · Yavapai County |
90 | 6 | 1 | |
|
Lazy JR Ranch RV Park Tonto Basin · Gila County |
90 | 2 | 1 | |
|
Double Adobe RV Park Double Adobe · Cochise County |
82 | 1 | 0 | |
|
Kinlichee Staff Housing Bia Kinlichee · County |
80 | 5 | 1 | |
|
3 Dreamers RV Park LLC Vicksburg · La Paz County |
78 | 1 | 0 | |
|
303 Dwid Adamana · Navajo County |
75 | 4 | 0 | |
|
Co-Op Grill Arlington · Maricopa County |
75 | 1 | 0 | |
|
Sure Stay Water System Chambers · Apache County |
75 | 3 | 2 | |
|
Rye Trailer Park Payson · Gila County |
70 | 4 | 0 | |
|
New Fields New Fields · County |
67 | 1 | 0 | |
|
Usfs-Cnf-Arcadia Mount Graham · Graham County |
67 | 1 | 0 | |
|
Usfs Conf Knoll Lake Camp Clints Well · Coconino County |
66 | 3 | 0 | |
|
Rim Resort Forest Lakes · Coconino County |
65 | 2 | 0 | |
|
Lazy J.r. Ranch Too Tonto Basin · Gila County |
63 | 2 | 0 | |
|
Beaver Dam Ranch LLC Beaver Dam · Mohave County |
60 | 3 | 0 | |
|
Oasis Trailer Park Goodyear · Maricopa County |
60 | 1 | 0 | |
|
Worden Water Company Three Points · Pima County |
60 | 6 | 0 | |
|
Blm San Pedro House Sierra Vista · Cochise County |
58 | 4 | 0 | |
|
Twin Palms County |
58 | 1 | 0 | |
|
Picacho Peak Water Company Picacho · Pinal County |
55 | 7 | 1 | |
|
Buenos Aires National Wildlife Refuge Sasabe · Pima County |
54 | 7 | 1 | |
|
Camp Creek Association Camp Creek · Maricopa County |
50 | 1 | 0 | |
|
Fort Willcox RV Park Willcox · Cochise County |
50 | 2 | 0 | |
|
Morning Star Cafe Hereford · Cochise County |
50 | 1 | 0 | |
|
Usfs Cnf Columbine Mount Graham · Graham County |
50 | 1 | 0 | |
|
Usfs Cnf Treasure Park Safford · Graham County |
50 | 2 | 0 | |
|
Veterans of Foreign Wars Post 2357 Bouse · La Paz County |
50 | 4 | 0 | |
|
Word of Life Assembly Chino Valley · Yavapai County |
50 | 3 | 1 | |
|
Northern Section 4 Coop Apache Junction · Pinal County |
48 | 6 | 3 | |
|
Alchesay Fish Hatchery Fish Hatchery · County |
46 | 2 | 0 | |
|
Lakeside Ski Village Lakeside Ski Village · Maricopa County |
46 | 2 | 0 | |
|
Greenlee Country Club York · Greenlee County |
45 | 2 | 0 | |
|
Pines to Palms Mobile Home RV Park Beaver Dam · Mohave County |
45 | 3 | 1 | |
|
Adot Little Antelope Munds Park · Coconino County |
44 | 1 | 0 | |
|
Hannagan Meadows Lodge Alpine · Greenlee County |
40 | 3 | 0 | |
|
Paradise Point County |
40 | 1 | 0 | |
|
Youth Haven Ranches Tucson · Pinal County |
40 | 2 | 0 | |
|
Creekside Homes Sedona · Coconino County |
36 | 2 | 0 | |
|
Stage Coach Trails Guest Ranch Lake Havasu City · Mohave County |
34 | 3 | 0 | |
|
Usfs Conf Blue Ridge Ranger Station Clints Well · Coconino County |
32 | 4 | 0 | |
|
Usfs Conf Double Springs Mormon Lake · Coconino County |
32 | 4 | 1 | |
|
Blm Burro Creek Campground Kingman · Mohave County |
30 | 4 | 2 | |
|
Oak Creek Terrace Motel Oak Creek Canyon · Coconino County |
30 | 3 | 1 | |
|
Tortilla Flat Resort Tortilla Flat · Maricopa County |
30 | 3 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrate, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrate 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.