COSTILLA MDWCA
PWS ID: NM3505929 · COSTILLA, New Mexico 87524
Population Served
244
Total Violations
244
Health-Based Violations
64
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 100
- County
- Taos
- School/Daycare
- No
- MCL Violations
- 34
- Monitoring Violations
- 109
- Treatment Tech Violations
- 30
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 54 | 2014 |
| Coliform (TCR) | MCL | 34 | 2014 |
| Consumer Confidence Rule | Other | 30 | 2025 |
| Groundwater Rule | TT | 28 | 2016 |
| Revised Total Coliform Rule | MON | 18 | 2020 |
| Public Notice | Other | 14 | 2021 |
| Chlorine | MR | 11 | 2021 |
| Lead and Copper Rule | MR | 8 | 2019 |
| TTHM | MR | 7 | 2018 |
| Total Haloacetic Acids (HAA5) | MR | 7 | 2018 |
| Coliform (Pre-TCR) | Other | 6 | 1990 |
| E. COLI | MR | 4 | 2012 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
| Groundwater Rule | Other | 2 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.