NACO ESTATES
PWS ID: AZ0402345 · SIERRA VISTA, Arizona 85635
Population Served
75
Total Violations
53
Health-Based Violations
10
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Public/Private
- Connections
- 30
- County
- Cochise
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 21
- Treatment Tech Violations
- 10
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 12 | 2025 |
| Lead and Copper Rule | MR | 7 | 2020 |
| E. COLI | MR | 7 | 2024 |
| Coliform (TCR) | MR | 6 | 2014 |
| Revised Total Coliform Rule | TT | 6 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 4 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 4 | 2024 |
| Public Notice | Other | 2 | 2024 |
| Revised Total Coliform Rule | RPT | 2 | 2020 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1980 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.