SENTINEL HOLDINGS LLC
PWS ID: AZ0407292 · EL CAJON, Arizona 92019
Population Served
37
Total Violations
18
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- Public/Private
- Connections
- 12
- County
- Maricopa
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 15
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 5 | 2018 |
| Nitrite | MR | 2 | 2005 |
| Selenium | MR | 1 | 1989 |
| Barium | MR | 1 | 1989 |
| Chromium | MR | 1 | 1989 |
| Fluoride | MR | 1 | 1989 |
| Arsenic | MR | 1 | 1989 |
| Coliform (TCR) | MR | 1 | 2001 |
| Cadmium | MR | 1 | 1989 |
| Mercury | MR | 1 | 1989 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.