What was found in ZIP 58370
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 |
|---|---|---|---|
| Fluoride | 502 µg/L 13% of the EPA limit 4000 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2013 | 1/1 | SYR4 |
| Copper | 446.8 µg/L 34% of the EPA limit 1300 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2018 | 1/1 | SYR4 |
| Nitrate-Nitrite | 380 µg/L 3.8% of the EPA limit 10000 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2019 | 1/1 | SYR4 |
| Cyanide | 72.45 µg/L 36% of the EPA limit 200 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2018 | 1/1 | SYR4 |
| Barium | 47.1 µg/L 2.4% of the EPA limit 2000 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2013 | 1/1 | SYR4 |
| Lithium | 26.6 µg/L No EPA limit set Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2025 | 1/1 | UCMR-5 |
| Arsenic | 13.85 µg/L 139% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2019 | 1/1 | SYR4 |
| Chromium | 10.706 µg/L 11% of the EPA limit 100 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2013 | 1/1 | SYR4 |
| Endothall | 9 µg/L 9% of the EPA limit 100 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2019 | 1/1 | SYR4 |
| Selenium | 2.26 µg/L 4.5% of the EPA limit 50 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2013 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.2625 µg/L 2.1% of the EPA limit 60 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2019 | 1/1 | SYR4 |
| Lead | 1.1 µg/L 7.3% of the EPA limit 15 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2018 | 1/1 | SYR4 |
| TTHM | 0.7020 µg/L 0.9% of the EPA limit 80 µg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0015 mg/L 10% of the EPA limit 0.0150 mg/L Main supplier: SPIRIT LAKE WATER MANAGEMENT RWS · 4,400 people · 2024 | 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 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 58370
| Supplier | State | Population served |
|---|---|---|
| SPIRIT LAKE WATER MANAGEMENT RWS | ND | 4,400 |
Frequently asked questions about ZIP 58370 tap water
Is the tap water in ZIP 58370 safe to drink?
EPA testing detected 14 contaminants across the water suppliers serving ZIP 58370. 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 58370?
1 public water supplier report EPA drinking-water monitoring for ZIP 58370. Each is listed above with its population served.
What contaminants are in ZIP 58370's water?
EPA monitoring detected Fluoride, Copper, Nitrate-Nitrite, Cyanide, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.