What was found in ZIP 85621
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 3700 µg/L 37% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Fluoride | 3000 µg/L 75% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Nitrate-Nitrite | 2200 µg/L 22% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Copper | 1000 µg/L 77% of the EPA limit 1300 µg/L | 1/1 | SYR4 |
| Lithium | 57.4 µg/L No EPA limit set | 1/1 | UCMR-5 |
| TTHM | 51 µg/L 64% of the EPA limit 80 µg/L | 1/1 | SYR4 |
| Asbestos | 23.5 MFL 336% of the EPA limit, in the worst sample — 7 MFL | 1/1 | SYR4 |
| Arsenic | 13 µg/L 130% of the EPA limit, in the worst sample — 10 µg/L | 1/1 | SYR4 |
| Combined Uranium | 7.9 µg/L 26% of the EPA limit 30 µg/L | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.9 pCi/L 33% of the EPA limit 15 pCi/L | 1/1 | SYR4 |
| Lead | 4.6 µg/L 31% of the EPA limit 15 µg/L | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 3.6 µg/L 6% of the EPA limit 60 µg/L | 1/1 | SYR4 |
| Trichloroethylene | 1.8 µg/L 36% of the EPA limit 5 µg/L | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 1/1 | 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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 85621
| Supplier | State | Population served |
|---|---|---|
| NOGALES CITY OF | AZ | 22,000 |
Frequently asked questions about ZIP 85621 tap water
Is the tap water in ZIP 85621 safe to drink?
EPA testing detected 14 contaminants across the water suppliers serving ZIP 85621. 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 85621?
1 public water supplier report EPA drinking-water monitoring for ZIP 85621. Each is listed above with its population served.
What contaminants are in ZIP 85621's water?
EPA monitoring detected Nitrate, Fluoride, Nitrate-Nitrite, Copper, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.