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 |
|---|---|---|---|
| TT | Health-based | Resolved | 2025-10-01 → 2025-10-31 |
| TT | Health-based | Resolved | 2025-10-01 → 2025-10-31 |
| TT | Health-based | Resolved | 2025-10-01 → 2025-10-31 |
| TT | Health-based | Resolved | 2023-04-01 |
| TT | Health-based | Resolved | 2023-04-01 |
| TT | Health-based | Resolved | 2023-04-01 |
| TT | Health-based | Resolved | 2023-04-01 |
| TT | Health-based | Resolved | 2023-04-01 |
| TT | Health-based | Resolved | 2023-04-01 |
| MCL | Health-based | Resolved | 2023-04-01 → 2023-06-30 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate-Nitrite | 15440 µg/L 154% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 16400 µg/L | 37/37 | SYR4 | 2012–2019 |
| Copper | 60.09 µg/L 4.6% of the EPA limit 1300 µg/L
worst single sample: 61 µg/L | 15/15 | SYR4 | 2012–2019 |
| Lead | 0.0040 mg/L 27% of the EPA limit 0.0150 mg/L | 12/12 | LCR | 2025 |
| Lead | 3.5 µg/L 23% of the EPA limit 15 µg/L
worst single sample: 4 µg/L | 6/15 | SYR4 | 2012–2019 |
| Nitrate | 16400 µg/L 164% of the EPA limit, at the 95th percentile of samples — 10000 µg/L | 4/4 | SYR4 | 2015–2017 |
| Total Haloacetic Acids (HAA5) | 5.23 µg/L 8.7% of the EPA limit 60 µg/L
worst single sample: 5.4 µg/L | 3/3 | SYR4 | 2014–2018 |
| Dichloroacetic Acid | 5.21 µg/L No EPA limit set
worst single sample: 5.4 µg/L | 2/3 | SYR4 | 2014–2018 |
| Bromodichloromethane | 1.6 µg/L No EPA limit set | 1/4 | SYR4 | 2014–2019 |
| Bromoform | 5.6 µg/L No EPA limit set | 1/4 | SYR4 | 2014–2019 |
| Chloroform | 0.6400 µg/L No EPA limit set | 1/4 | SYR4 | 2014–2019 |
| Combined Radium (-226 And -228) | 0.6800 pCi/L 14% of the EPA limit 5 pCi/L | 1/1 | SYR4 | 2016 |
| Dibromoacetic Acid | 3 µg/L No EPA limit set | 1/3 | SYR4 | 2014–2018 |
| Dibromochloromethane | 5 µg/L No EPA limit set | 1/4 | SYR4 | 2014–2019 |
| TTHM | 12.9 µg/L 16% of the EPA limit 80 µg/L | 1/4 | SYR4 | 2014–2019 |
59 contaminants tested, none detected
Utility contact
Frequently asked questions about Arrow Creek Trailer Court
Is Arrow Creek Trailer Court tap water safe to drink?
EPA monitoring detected 14 contaminants in Arrow Creek Trailer Court'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 Arrow Creek Trailer Court's water?
EPA monitoring detected Nitrate-Nitrite, Copper, Lead, Lead, Nitrate, and others. The full list with the level and data source for each is above.
How many people does Arrow Creek Trailer Court serve?
Arrow Creek Trailer Court reports serving 75 people in Montana, per its EPA record.
Has Arrow Creek Trailer Court had any water quality violations?
The EPA has 337 violations on file for Arrow Creek Trailer Court, of which 57 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.