SIERRA GRANDE SCHOOL DISTRICT
PWS ID: CO0212800 · BLANCA, Colorado 81123
Population Served
304
Total Violations
230
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 10
- County
- Costilla
- School/Daycare
- Yes
- MCL Violations
- 0
- Monitoring Violations
- 207
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 28 | 2014 |
| Chlorine | MR | 19 | 2019 |
| Public Notice | Other | 7 | 2023 |
| Revised Total Coliform Rule | Other | 7 | 2023 |
| Revised Total Coliform Rule | MON | 6 | 2019 |
| Lead and Copper Rule | MR | 4 | 2025 |
| 1,1-Dichloroethylene | MR | 3 | 1993 |
| 1,1,1-Trichloroethane | MR | 3 | 1993 |
| 1,1,2-Trichloroethane | MR | 3 | 1993 |
| 1,2,4-Trichlorobenzene | MR | 3 | 1993 |
| Carbon tetrachloride | MR | 3 | 1993 |
| cis-1,2-Dichloroethylene | MR | 3 | 1993 |
| Ethylbenzene | MR | 3 | 1993 |
| CHLOROBENZENE | MR | 3 | 1993 |
| p-Dichlorobenzene | MR | 3 | 1993 |
| Tetrachloroethylene | MR | 3 | 1993 |
| trans-1,2-Dichloroethylene | MR | 3 | 1993 |
| Xylenes, Total | MR | 3 | 1993 |
| 2,4-D | MR | 3 | 1993 |
| 2,4,5-TP | MR | 3 | 1993 |
| Atrazine | MR | 3 | 1993 |
| Benzo(a)pyrene | MR | 3 | 1993 |
| Chlordane | MR | 3 | 1993 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 3 | 1993 |
| Dinoseb | MR | 3 | 1993 |
| Diquat | MR | 3 | 1993 |
| Endothall | MR | 3 | 1993 |
| Endrin | MR | 3 | 1993 |
| ETHYLENE DIBROMIDE | MR | 3 | 1993 |
| Heptachlor | MR | 3 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.