What was found in Turtle 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 | 2620 µg/L 26% of the EPA limit 10000 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019 | 1/4 | SYR4 |
| Nitrate-Nitrite | 2540 µg/L 25% of the EPA limit 10000 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019 | 1/4 | SYR4 |
| Fluoride | 1410 µg/L 35% of the EPA limit 4000 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2016 | 1/4 | SYR4 |
| Copper | 575.2 µg/L 44% of the EPA limit 1300 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 944.5 µg/L — MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 3 · 400 people · 2018 | 4/4 | SYR4 |
| Barium | 186 µg/L 9.3% of the EPA limit 2000 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2016 | 1/4 | SYR4 |
| TTHM | 47.833 µg/L 60% of the EPA limit 80 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 130.445 µg/L — MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 2 · 390 people · 2019 | 4/4 | SYR4 |
| Chloroform | 36.202 µg/L No EPA limit set Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 109.389 µg/L — MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 2 · 390 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 17.186 µg/L 29% of the EPA limit 60 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 72.255 µg/L — MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 2 · 390 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 9.275 µg/L No EPA limit set Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 40.25 µg/L — MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 2 · 390 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 6.71 µg/L No EPA limit set Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 33.675 µg/L — MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 2 · 390 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 12.457 µg/L No EPA limit set Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 18.767 µg/L — MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 2 · 390 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 4.987 µg/L No EPA limit set Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 9.235 µg/L — TURTLE LAKE CITY OF · 581 people · 2019 | 4/4 | SYR4 |
| Combined Uranium | 6.26 µg/L 21% of the EPA limit 30 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2017 | 1/4 | SYR4 |
| Lead | 4.42 µg/L 29% of the EPA limit 15 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 4.159 µg/L No EPA limit set Highest in the city: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 3 · 400 people · 2019 | 2/4 | SYR4 |
| Bromoform | 0.6425 µg/L No EPA limit set Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 2.8975 µg/L — TURTLE LAKE CITY OF · 581 people · 2019 | 2/4 | SYR4 |
| Dibromoacetic Acid | 2.124 µg/L No EPA limit set Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2019
Highest in the city: 2.656 µg/L — TURTLE LAKE CITY OF · 581 people · 2019 | 4/4 | SYR4 |
| Arsenic | 1.26 µg/L 13% of the EPA limit 10 µg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2016 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 0.2700 pCi/L 5.4% of the EPA limit 5 pCi/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2017 | 1/4 | SYR4 |
| Lead | 0.0011 mg/L 7.1% of the EPA limit 0.0150 mg/L Main supplier: MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 · 1,800 people · 2025
Highest in the city: 0.0042 mg/L — TURTLE LAKE CITY OF · 581 people · 2023 | 4/4 | 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 Turtle Lake
| Supplier | Population served |
|---|---|
| MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 | 1,800 |
| TURTLE LAKE CITY OF | 581 |
| MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 3 | 400 |
| MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 2 | 390 |
Frequently asked questions about Turtle Lake tap water
Is Turtle Lake tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Turtle 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 Turtle Lake?
4 public water suppliers report drinking-water monitoring for Turtle Lake, North Dakota to the EPA. Each is listed above with its population served.
What contaminants are in Turtle Lake's water?
The contaminants EPA monitoring detected in Turtle Lake include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.