MACKAY CITY OF
PWS ID: ID7190032 · MACKAY, Idaho 83251
Population Served
566
Total Violations
41
Health-Based Violations
11
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 400
- County
- Custer
- School/Daycare
- No
- MCL Violations
- 11
- Monitoring Violations
- 30
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 11 | 2013 |
| Lead and Copper Rule | MR | 6 | 2010 |
| Coliform (TCR) | MR | 6 | 2003 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 1996 |
| Atrazine | MR | 3 | 2005 |
| Arsenic | MR | 3 | 2002 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 2018 |
| Radium-226 | MR | 2 | 2018 |
| Radium-228 | MR | 2 | 2018 |
| Combined Uranium | MR | 2 | 2018 |
| Nitrate | MR | 1 | 1998 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.