ROCKPORT COLONY
PWS ID: MT0001778 · PENDROY, Montana 59467
Population Served
92
Total Violations
203
Health-Based Violations
38
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 10
- County
- Teton
- School/Daycare
- No
- MCL Violations
- 38
- Monitoring Violations
- 160
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 24 | 2012 |
| Lead and Copper Rule | MR | 10 | 2020 |
| Nitrate-Nitrite | MCL | 9 | 2018 |
| Coliform (TCR) | MR | 9 | 2001 |
| Mercury | MCL | 4 | 2002 |
| Endrin | MR | 3 | 2011 |
| BHC-GAMMA | MR | 3 | 2011 |
| Methoxychlor | MR | 3 | 2011 |
| Toxaphene | MR | 3 | 2011 |
| Dalapon | MR | 3 | 2011 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2011 |
| OXAMYL | MR | 3 | 2011 |
| Simazine | MR | 3 | 2011 |
| Picloram | MR | 3 | 2011 |
| Hexachlorocyclopentadiene | MR | 3 | 2011 |
| Aldicarb sulfoxide | MR | 3 | 2011 |
| Aldicarb sulfone | MR | 3 | 2011 |
| Atrazine | MR | 3 | 2011 |
| Heptachlor | MR | 3 | 2011 |
| 2,4,5-TP | MR | 3 | 2011 |
| HEXACHLOROBENZENE | MR | 3 | 2011 |
| Benzo(a)pyrene | MR | 3 | 2011 |
| 1,2,4-Trichlorobenzene | MR | 3 | 2011 |
| cis-1,2-Dichloroethylene | MR | 3 | 2011 |
| Xylenes, Total | MR | 3 | 2011 |
| o-Dichlorobenzene | MR | 3 | 2011 |
| p-Dichlorobenzene | MR | 3 | 2011 |
| trans-1,2-Dichloroethylene | MR | 3 | 2011 |
| Carbon tetrachloride | MR | 3 | 2011 |
| Trichloroethylene | MR | 3 | 2011 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.