What was found in Hankinson's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Copper | 608.65 µg/L 47% of the EPA limit 1300 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2018
Highest in the city: 962.9 µg/L — HANKINSON CITY OF · 919 people · 2017 | 2/2 | SYR4 |
| Nitrate | 440 µg/L 4.4% of the EPA limit 10000 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 431 µg/L 4.3% of the EPA limit 10000 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2019 | 1/2 | SYR4 |
| TTHM | 23.965 µg/L 30% of the EPA limit 80 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2017
Highest in the city: 26.767 µg/L — HANKINSON CITY OF · 919 people · 2019 | 2/2 | SYR4 |
| Chloroform | 21.044 µg/L No EPA limit set Highest in the city: HANKINSON CITY OF · 919 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.2395 µg/L 12% of the EPA limit 60 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2017
Highest in the city: 18.295 µg/L — HANKINSON CITY OF · 919 people · 2019 | 2/2 | SYR4 |
| Barium | 18 µg/L 0.9% of the EPA limit 2000 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2016 | 1/2 | SYR4 |
| Arsenic | 15.075 µg/L 151% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 10.137 µg/L No EPA limit set Highest in the city: HANKINSON CITY OF · 919 people · 2019 | 1/2 | SYR4 |
| Lead | 0.7245 µg/L 4.8% of the EPA limit 15 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2018
Highest in the city: 9.794 µg/L — HANKINSON CITY OF · 919 people · 2017 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 9.625 pCi/L 64% of the EPA limit 15 pCi/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2017 | 1/2 | SYR4 |
| Nitrite | 9 µg/L 0.9% of the EPA limit 1000 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 7.98 µg/L 27% of the EPA limit 30 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2017 | 1/2 | SYR4 |
| Trichloroacetic Acid | 7.438 µg/L No EPA limit set Highest in the city: HANKINSON CITY OF · 919 people · 2019 | 1/2 | SYR4 |
| Chromium | 5.1 µg/L 5.1% of the EPA limit 100 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2016 | 1/2 | SYR4 |
| Bromodichloromethane | 4.786 µg/L No EPA limit set Highest in the city: HANKINSON CITY OF · 919 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 2.87 µg/L No EPA limit set Highest in the city: HANKINSON CITY OF · 919 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 2 pCi/L 40% of the EPA limit 5 pCi/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2017 | 1/2 | SYR4 |
| Dibromochloromethane | 0.9375 µg/L No EPA limit set Highest in the city: HANKINSON CITY OF · 919 people · 2019 | 1/2 | SYR4 |
| Selenium | 0.8300 µg/L 1.7% of the EPA limit 50 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2016 | 1/2 | SYR4 |
| Mercury | 0.1300 µg/L 6.5% of the EPA limit 2 µg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2016 | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: DAKOTA MAGIC CASINO · 2,360 people · 2025
Highest in the city: 0.0037 mg/L — HANKINSON CITY OF · 919 people · 2023 | 2/2 | 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Hankinson
| Supplier | Population served |
|---|---|
| DAKOTA MAGIC CASINO | 2,360 |
| HANKINSON CITY OF | 919 |
Frequently asked questions about Hankinson tap water
Is Hankinson tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Hankinson. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Hankinson?
2 public water suppliers report drinking-water monitoring for Hankinson, North Dakota to the EPA. Each is listed above with its population served.
What contaminants are in Hankinson's water?
The contaminants EPA monitoring detected in Hankinson include Copper, Nitrate, Nitrate-Nitrite, TTHM, Chloroform. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.