HERON COMMUNITY WATER SYSTEM
PWS ID: MT0000247 · HERON, Montana 59844
Population Served
84
Total Violations
304
Health-Based Violations
23
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 46
- County
- Sanders
- School/Daycare
- No
- MCL Violations
- 23
- Monitoring Violations
- 281
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Gross Alpha, Excl. Radon and U | MR | 38 | 2008 |
| Combined Radium (-226 and -228) | MR | 38 | 2008 |
| Coliform (TCR) | MCL | 23 | 2014 |
| Coliform (TCR) | MR | 19 | 1999 |
| Lead and Copper Rule | MR | 14 | 2020 |
| Nitrate-Nitrite | MR | 9 | 2006 |
| Arsenic | MR | 6 | 2011 |
| Nickel | MR | 3 | 2002 |
| Antimony, Total | MR | 3 | 2002 |
| Thallium, Total | MR | 3 | 2002 |
| Dalapon | MR | 3 | 2002 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2002 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2002 |
| Picloram | MR | 3 | 2002 |
| Dinoseb | MR | 3 | 2002 |
| Hexachlorocyclopentadiene | MR | 3 | 2002 |
| Atrazine | MR | 3 | 2002 |
| LASSO | MR | 3 | 2002 |
| Heptachlor | MR | 3 | 2002 |
| Heptachlor epoxide | MR | 3 | 2002 |
| 2,4-D | MR | 3 | 2002 |
| 2,4,5-TP | MR | 3 | 2002 |
| Benzo(a)pyrene | MR | 3 | 2002 |
| Pentachlorophenol | MR | 3 | 2002 |
| 1,2,4-Trichlorobenzene | MR | 3 | 2002 |
| cis-1,2-Dichloroethylene | MR | 3 | 2002 |
| DICHLOROMETHANE | MR | 3 | 2002 |
| 1,1-Dichloroethylene | MR | 3 | 2002 |
| 1,2-Dichloroethane | MR | 3 | 2002 |
| 1,2-Dichloropropane | MR | 3 | 2002 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.