What was found in Wahpeton'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 | 24.38 µg/L 1.9% of the EPA limit 1300 µg/L Main supplier: WAHPETON CITY OF · 7,766 people · 2018
Highest in the city: 783.45 µg/L — SOUTHEAST WUD (EAST) · 4,225 people · 2019 | 2/2 | SYR4 |
| Fluoride | 720 µg/L 18% of the EPA limit 4000 µg/L Main supplier: WAHPETON CITY OF · 7,766 people · 2018
Highest in the city: 733 µg/L — SOUTHEAST WUD (EAST) · 4,225 people · 2018 | 2/2 | SYR4 |
| Nitrate-Nitrite | 330 µg/L 3.3% of the EPA limit 10000 µg/L Main supplier: WAHPETON CITY OF · 7,766 people · 2019 | 1/2 | SYR4 |
| Barium | 5.52 µg/L 0.3% of the EPA limit 2000 µg/L Main supplier: WAHPETON CITY OF · 7,766 people · 2018
Highest in the city: 247 µg/L — SOUTHEAST WUD (EAST) · 4,225 people · 2018 | 2/2 | SYR4 |
| Lithium | 62.6 µg/L No EPA limit set Main supplier: WAHPETON CITY OF · 7,766 people · 2025 | 2/2 | UCMR-5 |
| TTHM | 0.5770 µg/L 0.7% of the EPA limit 80 µg/L Main supplier: WAHPETON CITY OF · 7,766 people · 2019
Highest in the city: 30.0105 µg/L — SOUTHEAST WUD (EAST) · 4,225 people · 2019 | 2/2 | SYR4 |
| Chloroform | 0.5770 µg/L No EPA limit set Main supplier: WAHPETON CITY OF · 7,766 people · 2019
Highest in the city: 18.525 µg/L — SOUTHEAST WUD (EAST) · 4,225 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.31 µg/L 12% of the EPA limit 60 µg/L Main supplier: WAHPETON CITY OF · 7,766 people · 2019
Highest in the city: 18.3135 µg/L — SOUTHEAST WUD (EAST) · 4,225 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 9.725 µg/L No EPA limit set Highest in the city: SOUTHEAST WUD (EAST) · 4,225 people · 2019 | 1/2 | SYR4 |
| Arsenic | 8.94 µg/L 89% of the EPA limit 10 µg/L Highest in the city: SOUTHEAST WUD (EAST) · 4,225 people · 2016 | 1/2 | SYR4 |
| Dibromoacetic Acid | 7.31 µg/L No EPA limit set Main supplier: WAHPETON CITY OF · 7,766 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 7.064 µg/L No EPA limit set Highest in the city: SOUTHEAST WUD (EAST) · 4,225 people · 2019 | 1/2 | SYR4 |
| Lead | 6.2895 µg/L 42% of the EPA limit 15 µg/L Main supplier: WAHPETON CITY OF · 7,766 people · 2018 | 2/2 | SYR4 |
| Bromodichloromethane | 4.147 µg/L No EPA limit set Highest in the city: SOUTHEAST WUD (EAST) · 4,225 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 2.84 µg/L No EPA limit set Highest in the city: SOUTHEAST WUD (EAST) · 4,225 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 0.1890 µg/L 0.6% of the EPA limit 30 µg/L Main supplier: WAHPETON CITY OF · 7,766 people · 2018
Highest in the city: 2.49 µg/L — SOUTHEAST WUD (EAST) · 4,225 people · 2017 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.35 pCi/L 16% of the EPA limit 15 pCi/L Main supplier: WAHPETON CITY OF · 7,766 people · 2018 | 2/2 | SYR4 |
| Chromium | 1.58 µg/L 1.6% of the EPA limit 100 µg/L Highest in the city: SOUTHEAST WUD (EAST) · 4,225 people · 2018 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.0800 pCi/L 1.6% of the EPA limit 5 pCi/L Main supplier: WAHPETON CITY OF · 7,766 people · 2018
Highest in the city: 0.9600 pCi/L — SOUTHEAST WUD (EAST) · 4,225 people · 2017 | 2/2 | SYR4 |
| Dibromochloromethane | 0.8750 µg/L No EPA limit set Highest in the city: SOUTHEAST WUD (EAST) · 4,225 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0024 mg/L 16% of the EPA limit 0.0150 mg/L Main supplier: WAHPETON CITY OF · 7,766 people · 2024
Highest in the city: 0.0039 mg/L — SOUTHEAST WUD (EAST) · 4,225 people · 2025 | 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 Wahpeton
| Supplier | Population served |
|---|---|
| WAHPETON CITY OF | 7,766 |
| SOUTHEAST WUD (EAST) | 4,225 |
Frequently asked questions about Wahpeton tap water
Is Wahpeton tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Wahpeton. 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 Wahpeton?
2 public water suppliers report drinking-water monitoring for Wahpeton, North Dakota to the EPA. Each is listed above with its population served.
What contaminants are in Wahpeton's water?
The contaminants EPA monitoring detected in Wahpeton include Copper, Fluoride, Nitrate-Nitrite, Barium, Lithium. 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.