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 |
|---|---|---|---|---|
|
Leupp Contract Boarding School Bia Leupp · County |
250 | 3 | 0 | |
|
Rocky Ridge Boarding School Bia Dinnebito · County |
250 | 4 | 3 | |
|
Springs of Living Water Prescott · Yavapai County |
250 | 3 | 0 | |
|
Usda Tnf Grapevine Group Water System Grapevine · Gila County |
241 | 4 | 0 | |
|
Nazlini Community Boarding School Bia Nazlini · County |
230 | 2 | 1 | |
|
Chinle Usd 24 Administration Center Chinle · County |
220 | 5 | 3 | |
|
Wide Ruins Community Boarding School Bia Wide Ruins · County |
215 | 4 | 1 | |
|
Santa Catalina Catholic Church Tucson · Pima County |
212 | 2 | 0 | |
|
Tonto Rim Christian Camp Kohls Ranch · Gila County |
208 | 4 | 0 | |
|
Sleepy Hollow RV County |
207 | 6 | 5 | |
|
Usfs Asnf Rolfe Hoyer Campground Greer · Apache County |
204 | 2 | 0 | |
|
Carrizo Store County |
203 | 4 | 2 | |
|
Hualapai Mountain Park Hualapai · Mohave County |
200 | 2 | 1 | |
|
Havasupai Campground Havasupai Campground · County |
200 | 1 | 0 | |
|
Indian Ruins Holbrook · Apache County |
200 | 4 | 0 | |
|
Latter Day Saints Church Summerhaven · Pima County |
200 | 4 | 1 | |
|
Stadium Chevron Glendale · Maricopa County |
200 | 4 | 0 | |
|
Usfs Tnf Cholla Campground Cholla Campground · Gila County |
200 | 4 | 1 | |
|
Usfs Tnf Tortilla Campground Tortilla Flat · Maricopa County |
200 | 4 | 2 | |
|
W Ranch Resort Payson · Gila County |
200 | 4 | 1 | |
|
Cottonwood Day School Bia Cottonwood · County |
185 | 3 | 0 | |
|
Fort McDowell Adventures County |
180 | 1 | 0 | |
|
Grand View Camp Eagar · Apache County |
180 | 3 | 0 | |
|
Kinlichee Community School Bia Kinlichee · County |
174 | 5 | 2 | |
|
Hunters Point Boarding School Bia Hunters Point · County |
173 | 7 | 1 | |
|
Greenfields Country Day School Tucson · Pima County |
163 | 6 | 0 | |
|
Antelope Peak Dwid Stanfield · Pinal County |
150 | 6 | 2 | |
|
Caballo Loco Ranch Sasabe · Pima County |
150 | 3 | 1 | |
|
Kaka Kaka · County |
150 | 3 | 1 | |
|
Lazy L Resort RV Park Overgaard · Navajo County |
150 | 3 | 1 | |
|
Usaf Gila Bend Gila Bend · Maricopa County |
150 | 4 | 0 | |
|
Usfs Tnf Burnt Corral Apache Lake · Maricopa County |
140 | 4 | 2 | |
|
Amerind Foundation Dragoon · Cochise County |
135 | 1 | 0 | |
|
Coronado Memorial Sierra Vista · Cochise County |
135 | 2 | 0 | |
|
Apache Mobile Home and RV Park, LLC Globe · Gila County |
130 | 6 | 2 | |
|
Sonoita Mercantile Water System Sonoita · Santa Cruz County |
125 | 3 | 0 | |
|
Pine Springs Day School Bia Houck, North Of · County |
122 | 4 | 2 | |
|
AZ State Parks Picacho Peak Picacho · Pinal County |
121 | 1 | 0 | |
|
Sunrise Resort at Page Springs Page Springs · Yavapai County |
120 | 2 | 1 | |
|
Desert Gem Trailer Park Salome · La Paz County |
110 | 3 | 0 | |
|
OX Bow Estates RV Park Payson · Gila County |
104 | 1 | 0 | |
|
Blm Cedar Pockets Rest Area Littlefield · Mohave County |
100 | 2 | 0 | |
|
Bowie Travel Center Bowie · Cochise County |
100 | 1 | 0 | |
|
Canyon West RV Park LLC Kingman · Mohave County |
100 | 2 | 0 | |
|
Coolidge Florence Elks Lodge 2350 Florence · Pinal County |
100 | 2 | 0 | |
|
LA Paz County Parks Centennial Park Wenden · La Paz County |
100 | 1 | 0 | |
|
Maricopa Agriculture Center Maricopa · Pinal County |
100 | 6 | 0 | |
|
Nellie E Saloon Parker · La Paz County |
100 | 3 | 0 | |
|
New Saddleback Vista Maricopa · Pinal County |
100 | 4 | 1 | |
|
Phoenix City of SR85 Landfill Phoenix · Maricopa County |
100 | 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.