What was found in Minot'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 | 48.9 µg/L 3.8% of the EPA limit 1300 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2018
Highest in the city: 970.25 µg/L — NORTH PRAIRIE RWD-SYSTEM III · 2,742 people · 2018 | 4/4 | SYR4 |
| Fluoride | 720 µg/L 18% of the EPA limit 4000 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2016 | 2/4 | SYR4 |
| Nitrate-Nitrite | 700 µg/L 7% of the EPA limit 10000 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2019 | 2/4 | SYR4 |
| Lithium | 78 µg/L No EPA limit set Main supplier: MINOT CITY OF · 48,743 people · 2023 | 2/4 | UCMR-5 |
| TTHM | 57.296 µg/L 72% of the EPA limit 80 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2019 | 4/4 | SYR4 |
| Bromoform | 25.441 µg/L No EPA limit set Main supplier: MINOT CITY OF · 48,743 people · 2019 | 3/4 | SYR4 |
| Dibromochloromethane | 21.901 µg/L No EPA limit set Main supplier: MINOT CITY OF · 48,743 people · 2019 | 4/4 | SYR4 |
| Lead | 19.95 µg/L 133% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2018 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 14.501 µg/L 24% of the EPA limit 60 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2019
Highest in the city: 14.607 µg/L — NORTH PRAIRIE RWD-SYSTEM 1&2 · 7,748 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 10.6 µg/L No EPA limit set Main supplier: MINOT CITY OF · 48,743 people · 2019 | 4/4 | SYR4 |
| Monobromoacetic Acid | 10.05 µg/L No EPA limit set Main supplier: MINOT CITY OF · 48,743 people · 2019 | 1/4 | SYR4 |
| Bromodichloromethane | 10.035 µg/L No EPA limit set Main supplier: MINOT CITY OF · 48,743 people · 2019 | 4/4 | SYR4 |
| Barium | 4.33 µg/L 0.2% of the EPA limit 2000 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2016
Highest in the city: 8.64 µg/L — NORTH PRAIRIE RWD-SYSTEM III · 2,742 people · 2016 | 2/4 | SYR4 |
| Dichloroacetic Acid | 4.044 µg/L No EPA limit set Main supplier: MINOT CITY OF · 48,743 people · 2019
Highest in the city: 5.55 µg/L — NORTH PRAIRIE RWD-SYSTEM III · 2,742 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 5.12 µg/L No EPA limit set Highest in the city: NORTH PRAIRIE RWD-SYSTEM 1&2 · 7,748 people · 2019 | 1/4 | SYR4 |
| Chloroform | 4.102 µg/L No EPA limit set Main supplier: MINOT CITY OF · 48,743 people · 2019
Highest in the city: 4.564 µg/L — NORTH PRAIRIE RWD-SYSTEM 1&2 · 7,748 people · 2019 | 4/4 | SYR4 |
| Arsenic | 1.74 µg/L 17% of the EPA limit 10 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2016 | 1/4 | SYR4 |
| Selenium | 1.65 µg/L 3.3% of the EPA limit 50 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2016 | 1/4 | SYR4 |
| Chromium | 1.37 µg/L 1.4% of the EPA limit 100 µg/L Main supplier: MINOT CITY OF · 48,743 people · 2016 | 1/4 | SYR4 |
| Trichloroacetic Acid | 1.1995 µg/L No EPA limit set Main supplier: MINOT CITY OF · 48,743 people · 2019
Highest in the city: 1.25 µg/L — NORTH PRAIRIE RWD-SYSTEM 1&2 · 7,748 people · 2019 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 0.9700 pCi/L 19% of the EPA limit 5 pCi/L Highest in the city: NORTH PRAIRIE RWD-SYSTEM III · 2,742 people · 2017 | 1/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.3300 pCi/L 2.2% of the EPA limit 15 pCi/L Highest in the city: NORTH PRAIRIE RWD-SYSTEM III · 2,742 people · 2017 | 1/4 | SYR4 |
| Combined Uranium | 0.2700 µg/L 0.9% of the EPA limit 30 µg/L Highest in the city: NORTH PRAIRIE RWD-SYSTEM III · 2,742 people · 2017 | 1/4 | SYR4 |
| Lead | 0.0135 mg/L 90% of the EPA limit 0.0150 mg/L Main supplier: MINOT CITY OF · 48,743 people · 2024 | 4/4 | LCR |
| Pfpea | 0.0030 µg/L No EPA limit set Highest in the city: NORTH PRAIRIE RWD-SYSTEM 1&2 · 7,748 people · 2025 | 1/4 | 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.
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 Minot
| Supplier | Population served |
|---|---|
| MINOT CITY OF | 48,743 |
| NORTH PRAIRIE RWD-SYSTEM 1&2 | 7,748 |
| NORTH PRAIRIE RWD-SYSTEM III | 2,742 |
| WEST RIVER WATER AND SEWER | 450 |
Frequently asked questions about Minot tap water
Is Minot tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Minot. 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 Minot?
4 public water suppliers report drinking-water monitoring for Minot, North Dakota to the EPA. Each is listed above with its population served.
What contaminants are in Minot's water?
The contaminants EPA monitoring detected in Minot include Copper, Fluoride, Nitrate-Nitrite, Lithium, TTHM. 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.