GRASS LAND ESTATES
PWS ID: MT0004448 · EAST HELENA, Montana 59635
Population Served
228
Total Violations
65
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 91
- County
- Lewis and Clark
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 57
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 12 | 2010 |
| Coliform (TCR) | MR | 6 | 2007 |
| Carbofuran | MR | 3 | 2005 |
| 2,4,5-TP | MR | 3 | 2005 |
| 2,4-D | MR | 3 | 2005 |
| Pentachlorophenol | MR | 3 | 2005 |
| Aldicarb sulfone | MR | 3 | 2005 |
| OXAMYL | MR | 3 | 2005 |
| Nitrate-Nitrite | MR | 3 | 2020 |
| Revised Total Coliform Rule | MON | 3 | 2018 |
| Dinoseb | MR | 3 | 2005 |
| Picloram | MR | 3 | 2005 |
| Dalapon | MR | 3 | 2005 |
| Aldicarb sulfoxide | MR | 3 | 2005 |
| Aldicarb | MR | 3 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.