What was found in ZIP 58237
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 | 2280 µg/L 23% of the EPA limit 10000 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2017 | 1/1 | SYR4 |
| Nitrate-Nitrite | 2156 µg/L 22% of the EPA limit 10000 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Fluoride | 712 µg/L 18% of the EPA limit 4000 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2017 | 1/1 | SYR4 |
| Lithium | 89.1 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2025 | 1/1 | UCMR-5 |
| TTHM | 74.77 µg/L 93% of the EPA limit 80 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Chloroform | 57.416 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Copper | 56.89 µg/L 4.4% of the EPA limit 1300 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2018 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 43.688 µg/L 73% of the EPA limit 60 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 33.14 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Nitrite | 21 µg/L 2.1% of the EPA limit 1000 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2017 | 1/1 | SYR4 |
| Bromodichloromethane | 17.838 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Lead | 15.6 µg/L 104% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2018 | 1/1 | SYR4 |
| Dibromochloromethane | 10.624 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Barium | 9.33 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2017 | 1/1 | SYR4 |
| Trichloroacetic Acid | 8.5965 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 5.4875 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Xylenes, Total | 5.17 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2017 | 1/1 | SYR4 |
| Bromoform | 4.116 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 3.28 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2019 | 1/1 | SYR4 |
| Ethylbenzene | 0.7100 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2017 | 1/1 | SYR4 |
| Pentachlorophenol | 0.0200 µg/L 2% of the EPA limit 1 µg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2017 | 1/1 | SYR4 |
| Lead | 0.0097 mg/L 65% of the EPA limit 0.0150 mg/L Main supplier: GRAFTON CITY OF · 4,284 people · 2024 | 1/1 | LCR |
| Pfba | 0.0059 µg/L No EPA limit set Main supplier: GRAFTON CITY OF · 4,284 people · 2025 | 1/1 | 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 58237
| Supplier | State | Population served |
|---|---|---|
| GRAFTON CITY OF | ND | 4,284 |
Frequently asked questions about ZIP 58237 tap water
Is the tap water in ZIP 58237 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 58237. 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 58237?
1 public water supplier report EPA drinking-water monitoring for ZIP 58237. Each is listed above with its population served.
What contaminants are in ZIP 58237's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Lithium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.