What was found in ZIP 58801
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 |
|---|---|---|---|
| Fluoride | 810 µg/L 20% of the EPA limit 4000 µg/L | 1/2 | SYR4 |
| Nitrate-Nitrite | 300 µg/L 3% of the EPA limit 10000 µg/L | 1/2 | SYR4 |
| Copper | 198 µg/L 15% of the EPA limit 1300 µg/L | 2/2 | SYR4 |
| Lithium | 79 µg/L No EPA limit set | 2/2 | UCMR-5 |
| TTHM | 45.38 µg/L 57% of the EPA limit 80 µg/L | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 40.2 µg/L 67% of the EPA limit 60 µg/L | 2/2 | SYR4 |
| Chloroform | 38.7 µg/L No EPA limit set | 2/2 | SYR4 |
| Dichloroacetic Acid | 28.3 µg/L No EPA limit set | 2/2 | SYR4 |
| Barium | 14.3 µg/L 0.7% of the EPA limit 2000 µg/L | 1/2 | SYR4 |
| Bromodichloromethane | 10.09 µg/L No EPA limit set | 2/2 | SYR4 |
| Trichloroacetic Acid | 7.54 µg/L No EPA limit set | 2/2 | SYR4 |
| Lead | 5.01 µg/L 33% of the EPA limit 15 µg/L | 2/2 | SYR4 |
| Monochloroacetic Acid | 4.36 µg/L No EPA limit set | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.9 pCi/L 26% of the EPA limit 15 pCi/L | 1/2 | SYR4 |
| Dibromochloromethane | 3.18 µg/L No EPA limit set | 2/2 | SYR4 |
| Selenium | 1.44 µg/L 2.9% of the EPA limit 50 µg/L | 1/2 | SYR4 |
| Chromium | 1.17 µg/L 1.2% of the EPA limit 100 µg/L | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.14 µg/L No EPA limit set | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.7800 pCi/L 16% of the EPA limit 5 pCi/L | 1/2 | SYR4 |
| Pentachlorophenol | 0.0300 µg/L 3% of the EPA limit 1 µg/L | 1/2 | SYR4 |
| Pfba | 0.0063 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 2/2 | LCR |
| Combined Uranium | -0.44 µg/L -1.5% of the EPA limit 30 µg/L | 1/2 | SYR4 |
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 58801
| Supplier | State | Population served |
|---|---|---|
| WILLISTON CITY OF | ND | 26,426 |
| NORTHWEST RURAL WATER DISTRICT | ND | 5,102 |
Frequently asked questions about ZIP 58801 tap water
Is the tap water in ZIP 58801 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 58801. 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 58801?
2 public water suppliers report EPA drinking-water monitoring for ZIP 58801. Each is listed above with its population served.
What contaminants are in ZIP 58801's water?
EPA monitoring detected Fluoride, Nitrate-Nitrite, Copper, Lithium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.