What was found in ZIP 86303
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 1700 µg/L 17% of the EPA limit 10000 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 1694 µg/L 17% of the EPA limit 10000 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2018 | 1/2 | SYR4 |
| Fluoride | 1052.15 µg/L 26% of the EPA limit 4000 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2018 | 2/2 | SYR4 |
| Copper | 78.345 µg/L 6% of the EPA limit 1300 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019
Highest in the ZIP: 621.5 µg/L — PONDEROSA PARK DWID · 602 people · 2019 | 2/2 | SYR4 |
| Barium | 36.1 µg/L 1.8% of the EPA limit 2000 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2018
Highest in the ZIP: 96 µg/L — PONDEROSA PARK DWID · 602 people · 2013 | 2/2 | SYR4 |
| Lead | 18.654 µg/L 124% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019
Highest in the ZIP: 45.6 µg/L — PONDEROSA PARK DWID · 602 people · 2019 | 2/2 | SYR4 |
| TTHM | 11.875 µg/L 15% of the EPA limit 80 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019
Highest in the ZIP: 41.225 µg/L — PONDEROSA PARK DWID · 602 people · 2019 | 2/2 | SYR4 |
| Lithium | 18.9 µg/L No EPA limit set Main supplier: PRESCOTT CITY OF · 42,217 people · 2023
Highest in the ZIP: 36 µg/L — PONDEROSA PARK DWID · 602 people · 2025 | 2/2 | UCMR-5 |
| Dibromochloromethane | 18.3 µg/L No EPA limit set Highest in the ZIP: PONDEROSA PARK DWID · 602 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 16.58 µg/L 55% of the EPA limit 30 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019 | 2/2 | SYR4 |
| Chromium | 11.317 µg/L 11% of the EPA limit 100 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2018 | 2/2 | SYR4 |
| Bromodichloromethane | 10.9 µg/L No EPA limit set Highest in the ZIP: PONDEROSA PARK DWID · 602 people · 2019 | 1/2 | SYR4 |
| Arsenic | 9.75 µg/L 98% of the EPA limit 10 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.5 pCi/L 23% of the EPA limit 15 pCi/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019
Highest in the ZIP: 9.6 pCi/L — PONDEROSA PARK DWID · 602 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.944 µg/L 3.2% of the EPA limit 60 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019
Highest in the ZIP: 9.1 µg/L — PONDEROSA PARK DWID · 602 people · 2019 | 2/2 | SYR4 |
| Bromoform | 7.4 µg/L No EPA limit set Highest in the ZIP: PONDEROSA PARK DWID · 602 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 5.7 µg/L No EPA limit set Highest in the ZIP: PONDEROSA PARK DWID · 602 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.2 pCi/L 24% of the EPA limit 5 pCi/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019
Highest in the ZIP: 5.26 pCi/L — PONDEROSA PARK DWID · 602 people · 2019 | 2/2 | SYR4 |
| Selenium | 4.88 µg/L 9.8% of the EPA limit 50 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2018 | 1/2 | SYR4 |
| Chloroform | 4.1 µg/L No EPA limit set Highest in the ZIP: PONDEROSA PARK DWID · 602 people · 2019 | 1/2 | SYR4 |
| Trichloroethylene | 3.455 µg/L 69% of the EPA limit 5 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019 | 1/2 | SYR4 |
| Antimony, Total | 2.54 µg/L 42% of the EPA limit 6 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2018 | 1/2 | SYR4 |
| Dichloroacetic Acid | 2 µg/L No EPA limit set Highest in the ZIP: PONDEROSA PARK DWID · 602 people · 2019 | 1/2 | SYR4 |
| Thallium, Total | 1.643 µg/L 82% of the EPA limit 2 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2018 | 1/2 | SYR4 |
| Trichloroacetic Acid | 1.5 µg/L No EPA limit set Highest in the ZIP: PONDEROSA PARK DWID · 602 people · 2019 | 1/2 | SYR4 |
| Tetrachloroethylene | 0.9110 µg/L 18% of the EPA limit 5 µg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2019 | 1/2 | SYR4 |
| PFBS | 0.0075 µg/L No EPA limit set Main supplier: PRESCOTT CITY OF · 42,217 people · 2023
Highest in the ZIP: 0.0240 µg/L — PONDEROSA PARK DWID · 602 people · 2025 | 2/2 | UCMR-5 |
| Pfpea | 0.0149 µg/L No EPA limit set Main supplier: PRESCOTT CITY OF · 42,217 people · 2023 | 2/2 | UCMR-5 |
| Pfhxa | 0.0126 µg/L No EPA limit set Main supplier: PRESCOTT CITY OF · 42,217 people · 2023 | 2/2 | UCMR-5 |
| PFOA | 0.0114 µg/L No EPA limit set Main supplier: PRESCOTT CITY OF · 42,217 people · 2023 | 2/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: PRESCOTT CITY OF · 42,217 people · 2025
Highest in the ZIP: 0.0110 mg/L — PONDEROSA PARK DWID · 602 people · 2025 | 2/2 | LCR |
| PFOS | 0.0087 µg/L No EPA limit set Main supplier: PRESCOTT CITY OF · 42,217 people · 2023 | 2/2 | UCMR-5 |
| PFHXS | 0.0065 µg/L No EPA limit set Main supplier: PRESCOTT CITY OF · 42,217 people · 2023 | 2/2 | UCMR-5 |
| Pfhpa | 0.0036 µg/L No EPA limit set Main supplier: PRESCOTT CITY OF · 42,217 people · 2023 | 1/2 | UCMR-5 |
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.
Water suppliers serving ZIP 86303
| Supplier | State | Population served |
|---|---|---|
| PRESCOTT CITY OF | AZ | 42,217 |
| PONDEROSA PARK DWID | AZ | 602 |
Frequently asked questions about ZIP 86303 tap water
Is the tap water in ZIP 86303 safe to drink?
EPA testing detected 34 contaminants across the water suppliers serving ZIP 86303. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 86303?
2 public water suppliers report EPA drinking-water monitoring for ZIP 86303. Each is listed above with its population served.
What contaminants are in ZIP 86303's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.