YELLOWTAIL DAM GC SYSTEM
PWS ID: MT0002514 · YELLOWTAIL, Montana 59035
Population Served
125
Total Violations
226
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 50
- County
- Big Horn
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 214
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 12 | 2023 |
| Nitrate-Nitrite | MR | 11 | 2017 |
| Coliform (TCR) | MR | 9 | 2005 |
| Lead and Copper Rule | MR | 6 | 2024 |
| Selenium | MR | 5 | 2002 |
| Mercury | MR | 5 | 2002 |
| Cadmium | MR | 5 | 2002 |
| Arsenic | MR | 5 | 2002 |
| Barium | MR | 5 | 2002 |
| Antimony, Total | MR | 3 | 2002 |
| Chromium | MR | 3 | 2002 |
| Beryllium, Total | MR | 3 | 2002 |
| Toxaphene | MR | 3 | 2002 |
| Dalapon | MR | 3 | 2002 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2002 |
| OXAMYL | MR | 3 | 2002 |
| Simazine | MR | 3 | 2002 |
| Hexachlorocyclopentadiene | MR | 3 | 2002 |
| Carbofuran | MR | 3 | 2002 |
| Aldicarb | MR | 3 | 2002 |
| Atrazine | MR | 3 | 2002 |
| HEXACHLOROBENZENE | MR | 3 | 2002 |
| Benzo(a)pyrene | MR | 3 | 2002 |
| Pentachlorophenol | MR | 3 | 2002 |
| cis-1,2-Dichloroethylene | MR | 3 | 2002 |
| Xylenes, Total | MR | 3 | 2002 |
| o-Dichlorobenzene | MR | 3 | 2002 |
| p-Dichlorobenzene | MR | 3 | 2002 |
| Vinyl chloride | MR | 3 | 2002 |
| 1,1-Dichloroethylene | MR | 3 | 2002 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.