SOUTHWESTERN RESEARCH STATION
PWS ID: AZ0402357 · PORTAL, Arizona 85632
Population Served
40
Total Violations
246
Health-Based Violations
9
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 14
- County
- Cochise
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 212
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | MR | 41 | 2018 |
| Surface Water Treatment Rule | MR | 26 | 2018 |
| Chlorine | MR | 21 | 2009 |
| Lead and Copper Rule | MR | 14 | 2020 |
| TTHM | MR | 9 | 2017 |
| Total Haloacetic Acids (HAA5) | MR | 9 | 2017 |
| Coliform (TCR) | MR | 7 | 2007 |
| Revised Total Coliform Rule | RPT | 7 | 2024 |
| Revised Total Coliform Rule | TT | 6 | 2025 |
| E. COLI | MR | 3 | 2024 |
| Lead and Copper Rule | TT | 3 | 2019 |
| Nitrate | MR | 2 | 2000 |
| trans-1,2-Dichloroethylene | MR | 2 | 1998 |
| 1,2-Dichloroethane | MR | 2 | 1998 |
| 1,1,1-Trichloroethane | MR | 2 | 1998 |
| 1,2-Dichloropropane | MR | 2 | 1998 |
| CHLOROBENZENE | MR | 2 | 1998 |
| Toluene | MR | 2 | 1998 |
| Styrene | MR | 2 | 1998 |
| Xylenes, Total | MR | 2 | 2002 |
| DICHLOROMETHANE | MR | 2 | 1998 |
| Revised Total Coliform Rule | MON | 2 | 2018 |
| p-Dichlorobenzene | MR | 2 | 1998 |
| 1,1-Dichloroethylene | MR | 2 | 1998 |
| Benzene | MR | 2 | 1998 |
| Carbon tetrachloride | MR | 2 | 1998 |
| 1,1,2-Trichloroethane | MR | 2 | 1998 |
| o-Dichlorobenzene | MR | 2 | 1998 |
| Tetrachloroethylene | MR | 2 | 1998 |
| cis-1,2-Dichloroethylene | MR | 2 | 1998 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.