RANCHO SAN JOAQUIN MWC
PWS ID: CA3500581 · HOLLISTER, California 95024
Population Served
914
Total Violations
43
Health-Based Violations
16
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 30
- County
- San Benito
- School/Daycare
- No
- MCL Violations
- 15
- Monitoring Violations
- 22
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 13 | 1997 |
| Coliform (TCR) | MR | 7 | 2012 |
| TTHM | MR | 3 | 2021 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2021 |
| Lead and Copper Rule | MR | 3 | 2017 |
| Nitrate | MR | 3 | 2012 |
| Consumer Confidence Rule | Other | 2 | 2012 |
| Revised Total Coliform Rule | MON | 2 | 2018 |
| Arsenic | MCL | 2 | 2023 |
| Public Notice | Other | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
| Chlorine | MR | 1 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.