ROSSITER SCHOOL DISTRICT 01
PWS ID: MT0001447 · HELENA, Montana 59601
Population Served
550
Total Violations
175
Health-Based Violations
6
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 1
- County
- Lewis and Clark
- School/Daycare
- Yes
- MCL Violations
- 6
- Monitoring Violations
- 168
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 13 | 2012 |
| Lead and Copper Rule | MR | 7 | 2016 |
| Revised Total Coliform Rule | MON | 7 | 2018 |
| Coliform (TCR) | MCL | 6 | 2001 |
| p-Dichlorobenzene | MR | 3 | 2011 |
| Vinyl chloride | MR | 3 | 2011 |
| trans-1,2-Dichloroethylene | MR | 3 | 2011 |
| 1,2-Dichloroethane | MR | 3 | 2011 |
| 1,2-Dichloropropane | MR | 3 | 2011 |
| Trichloroethylene | MR | 3 | 2011 |
| 1,1,2-Trichloroethane | MR | 3 | 2011 |
| Tetrachloroethylene | MR | 3 | 2011 |
| CHLOROBENZENE | MR | 3 | 2011 |
| Toluene | MR | 3 | 2011 |
| Styrene | MR | 3 | 2011 |
| Methoxychlor | MR | 3 | 2011 |
| Toxaphene | MR | 3 | 2011 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2011 |
| Picloram | MR | 3 | 2011 |
| Aldicarb | MR | 3 | 2011 |
| Atrazine | MR | 3 | 2011 |
| LASSO | MR | 3 | 2011 |
| Heptachlor epoxide | MR | 3 | 2011 |
| HEXACHLOROBENZENE | MR | 3 | 2011 |
| Benzo(a)pyrene | MR | 3 | 2011 |
| Pentachlorophenol | MR | 3 | 2011 |
| OXAMYL | MR | 3 | 2011 |
| o-Dichlorobenzene | MR | 3 | 2011 |
| Aldicarb sulfone | MR | 3 | 2011 |
| BHC-GAMMA | MR | 3 | 2011 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.