What was found in Apache Junction's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 1753 µg/L 18% of the EPA limit 10000 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2019
Highest in the city: 10000 µg/L — NORTHERN SECTION 4 COOP · 48 people · 2019 | 4/4 | SYR4 |
| Nitrate-Nitrite | 1739 µg/L 17% of the EPA limit 10000 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2018
Highest in the city: 9460 µg/L — NORTHERN SECTION 4 COOP · 48 people · 2016 | 4/4 | SYR4 |
| Fluoride | 837.5 µg/L 21% of the EPA limit 4000 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2018
Highest in the city: 1580 µg/L — NORTHERN SECTION 4 COOP · 48 people · 2019 | 4/4 | SYR4 |
| Lithium | 796 µg/L No EPA limit set Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2024 | 2/4 | UCMR-5 |
| Chlorite | 515 µg/L 52% of the EPA limit 1000 µg/L Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Copper | 273.9 µg/L 21% of the EPA limit 1300 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2019 | 4/4 | SYR4 |
| Barium | 56.75 µg/L 2.8% of the EPA limit 2000 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2018
Highest in the city: 130 µg/L — APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 4/4 | SYR4 |
| TTHM | 34.775 µg/L 43% of the EPA limit 80 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2019
Highest in the city: 90.57 µg/L — APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 3/4 | SYR4 |
| Combined Uranium | 39.7104 µg/L 132% of the EPA limit, at the 95th percentile of samples — 30 µg/L Highest in the city: NORTHERN SECTION 4 COOP · 48 people · 2019 | 1/4 | SYR4 |
| Chloroform | 29.04 µg/L No EPA limit set Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.68 µg/L 16% of the EPA limit 60 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2019
Highest in the city: 26.2 µg/L — APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 2/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 21.9 pCi/L 146% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the city: NORTHERN SECTION 4 COOP · 48 people · 2019 | 1/4 | SYR4 |
| Bromodichloromethane | 20.06 µg/L No EPA limit set Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Dibromochloromethane | 17.42 µg/L No EPA limit set Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Lead | 6.375 µg/L 43% of the EPA limit 15 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2019
Highest in the city: 15 µg/L — APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 11.825 µg/L No EPA limit set Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Xylenes, Total | 10.6 µg/L 0.1% of the EPA limit 10000 µg/L Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Chromium | 9 µg/L 9% of the EPA limit 100 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2018 | 1/4 | SYR4 |
| Trichloroacetic Acid | 8.575 µg/L No EPA limit set Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Arsenic | 7.78 µg/L 78% of the EPA limit 10 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2019 | 4/4 | SYR4 |
| Toluene | 6.04 µg/L 0.6% of the EPA limit 1000 µg/L Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Selenium | 5.7 µg/L 11% of the EPA limit 50 µg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2018 | 2/4 | SYR4 |
| Bromoform | 4.48 µg/L No EPA limit set Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Dibromoacetic Acid | 4.025 µg/L No EPA limit set Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Ethylbenzene | 2.245 µg/L 0.3% of the EPA limit 700 µg/L Highest in the city: APACHE JUNCTION WATER DISTRICT · 15,610 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 2.055 pCi/L 41% of the EPA limit 5 pCi/L Highest in the city: NORTHERN SECTION 4 COOP · 48 people · 2019 | 2/4 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: ARIZONA WATER CO - APACHE JUNCTION · 62,055 people · 2025
Highest in the city: 0.0070 mg/L — ARIZONIAN RV RESORT · 225 people · 2023 | 4/4 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Apache Junction
| Supplier | Population served |
|---|---|
| ARIZONA WATER CO - APACHE JUNCTION | 62,055 |
| APACHE JUNCTION WATER DISTRICT | 15,610 |
| ARIZONIAN RV RESORT | 225 |
| NORTHERN SECTION 4 COOP | 48 |
Frequently asked questions about Apache Junction tap water
Is Apache Junction tap water safe to drink?
EPA testing detected 27 contaminants in the water serving Apache Junction. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Apache Junction?
4 public water suppliers report drinking-water monitoring for Apache Junction, Arizona to the EPA. Each is listed above with its population served.
What contaminants are in Apache Junction's water?
The contaminants EPA monitoring detected in Apache Junction include Nitrate, Nitrate-Nitrite, Fluoride, Lithium, Chlorite. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.