Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
| Violation | Type | Status | Period |
|---|---|---|---|
| MR | Monitoring | Resolved | 2025-01-01 → 2025-12-31 |
| MR | Monitoring | Resolved | 2025-01-01 → 2025-12-31 |
| MR | Monitoring | Resolved | 2025-01-01 → 2025-12-31 |
| Other | Monitoring | Resolved | 2023-10-01 |
| Other | Monitoring | Resolved | 2023-10-01 |
| Other | Monitoring | Resolved | 2023-07-01 |
| Other | Monitoring | Resolved | 2023-07-01 |
| MR | Monitoring | Resolved | 2023-01-01 → 2025-12-31 |
| MR | Monitoring | Resolved | 2023-01-01 → 2025-12-31 |
| MR | Monitoring | Resolved | 2023-01-01 → 2025-12-31 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate-Nitrite | 300 µg/L 3% of the EPA limit 10000 µg/L | 14/18 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 11/11 | LCR | 2017 |
| Copper | 120 µg/L 9.2% of the EPA limit 1300 µg/L | 10/10 | SYR4 | 2014–2017 |
| Bromodichloromethane | 8.2 µg/L No EPA limit set | 6/6 | SYR4 | 2013–2019 |
| Bromoform | 13 µg/L No EPA limit set | 6/6 | SYR4 | 2013–2019 |
| Chloroform | 3 µg/L No EPA limit set | 6/6 | SYR4 | 2013–2019 |
| Dibromochloromethane | 14 µg/L No EPA limit set | 6/6 | SYR4 | 2013–2019 |
| TTHM | 35 µg/L 44% of the EPA limit 80 µg/L | 6/6 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 7 µg/L No EPA limit set | 3/3 | SYR4 | 2013–2019 |
| Dichloroacetic Acid | 1.9 µg/L No EPA limit set | 3/3 | SYR4 | 2013–2019 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set | 3/3 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 10 µg/L 17% of the EPA limit 60 µg/L | 3/3 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 1.6 µg/L No EPA limit set | 3/3 | SYR4 | 2013–2019 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L | 1/3 | SYR4 | 2013–2019 |
| Combined Radium (-226 And -228) | 1.4 pCi/L 28% of the EPA limit 5 pCi/L | 1/1 | SYR4 | 2016 |
| Fluoride | 1100 µg/L 28% of the EPA limit 4000 µg/L | 1/1 | SYR4 | 2013 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L | 1/1 | SYR4 | 2013 |
53 contaminants tested, none detected
Utility contact
Frequently asked questions about Sun Prairie Water District
Is Sun Prairie Water District tap water safe to drink?
EPA monitoring detected 17 contaminants in Sun Prairie Water District's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Sun Prairie Water District's water?
EPA monitoring detected Nitrate-Nitrite, Lead, Copper, Bromodichloromethane, Bromoform, and others. The full list with the level and data source for each is above.
How many people does Sun Prairie Water District serve?
Sun Prairie Water District reports serving 350 people in Montana, per its EPA record.
Has Sun Prairie Water District had any water quality violations?
The EPA has 230 violations on file for Sun Prairie Water District, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
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.