BIG MESA WATER MDWCA
PWS ID: NM3573725 · CONCHAS DAM, New Mexico 88416
Population Served
250
Total Violations
332
Health-Based Violations
82
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 572
- County
- San Miguel
- School/Daycare
- No
- MCL Violations
- 78
- Monitoring Violations
- 230
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 87 | 2017 |
| Interim Enhanced Surface Water Treatment Rule | MR | 68 | 2017 |
| TTHM | MCL | 64 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 16 | 2022 |
| TTHM | MR | 16 | 2022 |
| Coliform (TCR) | MCL | 14 | 2012 |
| Lead and Copper Rule | MR | 14 | 2023 |
| Chlorine | MR | 12 | 2010 |
| Public Notice | Other | 11 | 2018 |
| Asbestos | MR | 4 | 2020 |
| Interim Enhanced Surface Water Treatment Rule | TT | 4 | 2016 |
| Coliform (TCR) | MR | 2 | 1991 |
| E. COLI | MR | 2 | 2008 |
| Fluoride | MR | 2 | 1982 |
| Nitrate | MR | 1 | 1980 |
| Arsenic | MR | 1 | 1982 |
| Chromium | MR | 1 | 1982 |
| Selenium | MR | 1 | 1982 |
| Cadmium | MR | 1 | 1982 |
| Mercury | MR | 1 | 1982 |
| Barium | MR | 1 | 1982 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.