MCCOY LAKE
PWS ID: 105300021 · WELLPINIT, 10 99040
Population Served
325
Total Violations
433
Health-Based Violations
7
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 90
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 397
- Treatment Tech Violations
- 7
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 58 | 2015 |
| Consumer Confidence Rule | Other | 17 | 2019 |
| Gross Alpha, Excl. Radon and U | MR | 14 | 2020 |
| Nitrate | MR | 14 | 2019 |
| Revised Total Coliform Rule | MON | 9 | 2022 |
| Atrazine | MR | 6 | 2008 |
| Benzene | MR | 6 | 2008 |
| Groundwater Rule | TT | 6 | 2025 |
| BHC-GAMMA | MR | 5 | 2008 |
| Carbofuran | MR | 5 | 2008 |
| Chlordane | MR | 5 | 2008 |
| Dalapon | MR | 5 | 2008 |
| Di(2-ethylhexyl) adipate | MR | 5 | 2008 |
| Diquat | MR | 5 | 2008 |
| Endrin | MR | 5 | 2008 |
| ETHYLENE DIBROMIDE | MR | 5 | 2008 |
| Glyphosate | MR | 5 | 2008 |
| Heptachlor | MR | 5 | 2008 |
| Heptachlor epoxide | MR | 5 | 2008 |
| HEXACHLOROBENZENE | MR | 5 | 2008 |
| Hexachlorocyclopentadiene | MR | 5 | 2008 |
| Methoxychlor | MR | 5 | 2008 |
| OXAMYL | MR | 5 | 2008 |
| Picloram | MR | 5 | 2008 |
| Total Polychlorinated Biphenyls (PCB) | MR | 5 | 2008 |
| 2,4-D | MR | 5 | 2008 |
| 1,2,4-Trichlorobenzene | MR | 5 | 2008 |
| o-Dichlorobenzene | MR | 5 | 2008 |
| p-Dichlorobenzene | MR | 5 | 2008 |
| trans-1,2-Dichloroethylene | MR | 5 | 2008 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.