What was found in Devils Lake'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 |
|---|---|---|---|
| Nitrate-Nitrite | 1320 µg/L 13% of the EPA limit 10000 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2019 | 1/2 | SYR4 |
| Nitrate | 1260 µg/L 13% of the EPA limit 10000 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2017 | 1/2 | SYR4 |
| Copper | 611.2 µg/L 47% of the EPA limit 1300 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2018
Highest in the city: 1064 µg/L — GREATER RAMSEY WATER DISTRICT · 5,280 people · 2017 | 2/2 | SYR4 |
| Fluoride | 807.05 µg/L 20% of the EPA limit 4000 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2017 | 2/2 | SYR4 |
| Lithium | 75 µg/L No EPA limit set Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2024
Highest in the city: 88 µg/L — GREATER RAMSEY WATER DISTRICT · 5,280 people · 2024 | 2/2 | UCMR-5 |
| Barium | 51.445 µg/L 2.6% of the EPA limit 2000 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2017 | 2/2 | SYR4 |
| TTHM | 38.627 µg/L 48% of the EPA limit 80 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2019 | 2/2 | SYR4 |
| Chloroform | 26.301 µg/L No EPA limit set Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2019 | 2/2 | SYR4 |
| Lead | 17.6155 µg/L 117% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2018 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.291 µg/L No EPA limit set Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2019
Highest in the city: 17.3 µg/L — GREATER RAMSEY WATER DISTRICT · 5,280 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 15.7075 µg/L 26% of the EPA limit 60 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2019
Highest in the city: 16.502 µg/L — GREATER RAMSEY WATER DISTRICT · 5,280 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 8.957 µg/L No EPA limit set Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 7.57 µg/L No EPA limit set Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 7.19 µg/L No EPA limit set Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2019 | 1/2 | SYR4 |
| Arsenic | 5.097 µg/L 51% of the EPA limit 10 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2018 | 2/2 | SYR4 |
| Dibromochloromethane | 3.689 µg/L No EPA limit set Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2019 | 1/2 | SYR4 |
| Chromium | 1.71 µg/L 1.7% of the EPA limit 100 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2017
Highest in the city: 3.17 µg/L — GREATER RAMSEY WATER DISTRICT · 5,280 people · 2017 | 2/2 | SYR4 |
| Combined Uranium | 1.26 µg/L 4.2% of the EPA limit 30 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2017 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.2900 pCi/L 5.8% of the EPA limit 5 pCi/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2017
Highest in the city: 0.5600 pCi/L — GREATER RAMSEY WATER DISTRICT · 5,280 people · 2018 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.1617 pCi/L 1.1% of the EPA limit 15 pCi/L Highest in the city: GREATER RAMSEY WATER DISTRICT · 5,280 people · 2018 | 1/2 | SYR4 |
| Pentachlorophenol | 0.0300 µg/L 3% of the EPA limit 1 µg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2017 | 1/2 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: DEVILS LAKE CITY OF · 7,141 people · 2024
Highest in the city: 0.0020 mg/L — GREATER RAMSEY WATER DISTRICT · 5,280 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 Devils Lake
| Supplier | Population served |
|---|---|
| DEVILS LAKE CITY OF | 7,141 |
| GREATER RAMSEY WATER DISTRICT | 5,280 |
Frequently asked questions about Devils Lake tap water
Is Devils Lake tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Devils Lake. 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 Devils Lake?
2 public water suppliers report drinking-water monitoring for Devils Lake, North Dakota to the EPA. Each is listed above with its population served.
What contaminants are in Devils Lake's water?
The contaminants EPA monitoring detected in Devils Lake include Nitrate-Nitrite, Nitrate, Copper, Fluoride, 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.