KNIGHTSEN ELEMENTARY SCHOOL
PWS ID: CA0706028 · KNIGHTSEN, California 94548
Population Served
350
Total Violations
38
Health-Based Violations
27
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 4
- County
- Contra Costa
- School/Daycare
- Yes
- MCL Violations
- 27
- Monitoring Violations
- 0
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 27 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.