GW OCOTILLO WATER - THUNDERHEAD
PWS ID: AZ0410179 · MARICOPA, Arizona 85138
Population Served
174
Total Violations
32
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 62
- County
- Pima
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 28
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 4 | 2006 |
| Beryllium, Total | MR | 3 | 2002 |
| Coliform (TCR) | MR | 2 | 2013 |
| trans-1,2-Dichloroethylene | MR | 1 | 2001 |
| 1,2-Dichloroethane | MR | 1 | 2001 |
| 1,1,1-Trichloroethane | MR | 1 | 2001 |
| 1,2-Dichloropropane | MR | 1 | 2001 |
| Trichloroethylene | MR | 1 | 2001 |
| Tetrachloroethylene | MR | 1 | 2001 |
| CHLOROBENZENE | MR | 1 | 2001 |
| Benzene | MR | 1 | 2001 |
| Toluene | MR | 1 | 2001 |
| Ethylbenzene | MR | 1 | 2001 |
| Chlorine | MR | 1 | 2004 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2007 |
| cis-1,2-Dichloroethylene | MR | 1 | 2001 |
| DICHLOROMETHANE | MR | 1 | 2001 |
| o-Dichlorobenzene | MR | 1 | 2001 |
| p-Dichlorobenzene | MR | 1 | 2001 |
| Styrene | MR | 1 | 2001 |
| 1,1-Dichloroethylene | MR | 1 | 2001 |
| 1,1,2-Trichloroethane | MR | 1 | 2001 |
| Nitrate | MR | 1 | 2004 |
| Carbon tetrachloride | MR | 1 | 2001 |
| Xylenes, Total | MR | 1 | 2001 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2001 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.