SIERRA HIGH SCHOOL
PWS ID: CA1000280 · TOLLHOUSE, California 93667
Population Served
720
Total Violations
16
Health-Based Violations
1
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 26
- County
- Fresno
- School/Daycare
- Yes
- MCL Violations
- 0
- Monitoring Violations
- 10
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 2 | 2008 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2016 |
| TTHM | MR | 2 | 2016 |
| Nitrate | MR | 2 | 2021 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | Other | 2 | 2016 |
| Revised Total Coliform Rule | MON | 2 | 2020 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.