MCDONALD TRAILER CT
PWS ID: MT0000402 · EAST HELENA, Montana 59635
Population Served
75
Total Violations
943
Health-Based Violations
3
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 24
- County
- Lewis and Clark
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 886
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 169 | 2024 |
| Coliform (TCR) | MR | 114 | 2015 |
| Consumer Confidence Rule | Other | 52 | 2024 |
| Lead and Copper Rule | MR | 21 | 2020 |
| Nitrate-Nitrite | MR | 18 | 2023 |
| Toluene | MR | 15 | 2015 |
| Combined Radium (-226 and -228) | MR | 14 | 2017 |
| Endrin | MR | 12 | 2014 |
| BHC-GAMMA | MR | 12 | 2014 |
| Methoxychlor | MR | 12 | 2014 |
| Toxaphene | MR | 12 | 2014 |
| Di(2-ethylhexyl) adipate | MR | 12 | 2014 |
| OXAMYL | MR | 12 | 2014 |
| Di(2-ethylhexyl) phthalate | MR | 12 | 2014 |
| Dinoseb | MR | 12 | 2014 |
| Hexachlorocyclopentadiene | MR | 12 | 2014 |
| Aldicarb sulfoxide | MR | 12 | 2014 |
| Aldicarb sulfone | MR | 12 | 2014 |
| Carbofuran | MR | 12 | 2014 |
| Atrazine | MR | 12 | 2014 |
| LASSO | MR | 12 | 2014 |
| HEXACHLOROBENZENE | MR | 12 | 2014 |
| Chlordane | MR | 12 | 2014 |
| Dalapon | MR | 12 | 2014 |
| Picloram | MR | 12 | 2014 |
| Aldicarb | MR | 12 | 2014 |
| Heptachlor | MR | 12 | 2014 |
| Heptachlor epoxide | MR | 12 | 2014 |
| 2,4-D | MR | 12 | 2014 |
| 2,4,5-TP | MR | 12 | 2014 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.