AZ STATE PKS PATAGONIA LAKE
PWS ID: AZ0412302 · NOGALES, Arizona 85621
Population Served
564
Total Violations
31
Health-Based Violations
1
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- State
- Connections
- 140
- County
- Santa Cruz
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 27
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 12 | 2010 |
| Nitrate | MR | 8 | 2013 |
| Revised Total Coliform Rule | RPT | 2 | 2020 |
| Coliform (TCR) | MCL | 1 | 2006 |
| Selenium | MR | 1 | 1988 |
| Cadmium | MR | 1 | 1988 |
| Fluoride | MR | 1 | 1988 |
| Arsenic | MR | 1 | 1985 |
| Chromium | MR | 1 | 1988 |
| Mercury | MR | 1 | 1988 |
| Barium | MR | 1 | 1988 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.