BUTTERFIELD RANCH
PWS ID: CA3701184 · SAN DIEGO, California 92109
Population Served
353
Total Violations
56
Health-Based Violations
11
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 308
- County
- San Diego
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 33
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 12 | 2008 |
| Revised Total Coliform Rule | MON | 10 | 2023 |
| Consumer Confidence Rule | Other | 8 | 2011 |
| Revised Total Coliform Rule | MCL | 6 | 2022 |
| E. COLI | MR | 4 | 2022 |
| Lead and Copper Rule | MR | 4 | 2023 |
| Coliform (TCR) | MCL | 2 | 2005 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1981 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
| Fluoride | MCL | 1 | 1984 |
| Fluoride | MR | 1 | 1980 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| Nitrate | MCL | 1 | 1988 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.