DAVE JOHNSTON POWER PLANT
PWS ID: WY5600291 · GLENROCK, Wyoming 82637
Population Served
165
Total Violations
39
Health-Based Violations
32
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 3
- County
- Converse
- School/Daycare
- No
- MCL Violations
- 23
- Monitoring Violations
- 7
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 18 | 2016 |
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 6 | 2015 |
| Total Haloacetic Acids (HAA5) | MCL | 5 | 2005 |
| Interim Enhanced Surface Water Treatment Rule | TT | 3 | 2013 |
| Coliform (TCR) | MR | 3 | 1993 |
| Interim Enhanced Surface Water Treatment Rule | MR | 2 | 2015 |
| Nitrate | MR | 1 | 1993 |
| Chlorine | MR | 1 | 2022 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.