SAN ISIDRO ISD
PWS ID: TX2140017 · SAN ISIDRO, Texas 78588-0010
Population Served
227
Total Violations
106
Health-Based Violations
3
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 25
- County
- Starr
- School/Daycare
- Yes
- MCL Violations
- 0
- Monitoring Violations
- 84
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 45 | 2009 |
| Lead and Copper Rule | MR | 12 | 2024 |
| Public Notice | Other | 5 | 2025 |
| Revised Total Coliform Rule | MON | 4 | 2023 |
| E. COLI | MR | 3 | 2020 |
| LEAD AND COPPER RULE REVISIONS | TT | 3 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 3 | 2024 |
| Barium | MR | 2 | 2008 |
| Mercury | MR | 2 | 2008 |
| Selenium | MR | 2 | 2008 |
| Antimony, Total | MR | 2 | 2008 |
| Arsenic | MR | 2 | 2008 |
| Nitrate | MR | 2 | 2008 |
| Chromium | MR | 2 | 2008 |
| Beryllium, Total | MR | 2 | 2008 |
| Cadmium | MR | 2 | 2008 |
| Thallium, Total | MR | 2 | 2008 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.