LA COSTA WATER USERS ASSOC
PWS ID: AZ0402041 · DOUGLAS, Arizona 85607
Population Served
30
Total Violations
113
Health-Based Violations
8
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Public/Private
- Connections
- 16
- County
- Cochise
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 62
- Treatment Tech Violations
- 8
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 34 | 2025 |
| Coliform (TCR) | MR | 16 | 2014 |
| Lead and Copper Rule | MR | 8 | 2021 |
| E. COLI | MR | 5 | 2022 |
| Revised Total Coliform Rule | TT | 4 | 2022 |
| Groundwater Rule | TT | 4 | 2023 |
| Nitrate | MR | 3 | 2000 |
| Chlorine | MR | 2 | 2008 |
| Revised Total Coliform Rule | RPT | 2 | 2020 |
| Public Notice | Other | 2 | 2021 |
| 1,2,4-Trichlorobenzene | MR | 1 | 1998 |
| cis-1,2-Dichloroethylene | MR | 1 | 1998 |
| DICHLOROMETHANE | MR | 1 | 1998 |
| o-Dichlorobenzene | MR | 1 | 1998 |
| p-Dichlorobenzene | MR | 1 | 1998 |
| trans-1,2-Dichloroethylene | MR | 1 | 1998 |
| 1,2-Dichloroethane | MR | 1 | 1998 |
| 1,2-Dichloropropane | MR | 1 | 1998 |
| 1,1,2-Trichloroethane | MR | 1 | 1998 |
| Tetrachloroethylene | MR | 1 | 1998 |
| CHLOROBENZENE | MR | 1 | 1998 |
| Benzene | MR | 1 | 1998 |
| Toluene | MR | 1 | 1998 |
| Styrene | MR | 1 | 1998 |
| Arsenic | MR | 1 | 1990 |
| Fluoride | MR | 1 | 1990 |
| Chromium | MR | 1 | 1990 |
| Cadmium | MR | 1 | 1990 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1988 |
| Barium | MR | 1 | 1990 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.