GW OCOTILLO WATER - THUNDERHEAD
Arizona — Community Water System — PWSID: AZ0410179
System Information
| PWSID | AZ0410179 |
| System Name | GW OCOTILLO WATER - THUNDERHEAD |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 20, 1981 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | Arizona |
| City | MARICOPA |
| ZIP Code | 85138 |
| Address | — |
| Organization | ARMIJO, SUSAN |
| Phone | 480-328-9281 |
Population & Service
| Population Served | 174 |
| Service Connections | 62 |
Drinking Water Violations (13)
This water system has 13 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb 1, 2013 | Feb 28, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | Total Coliform Rule |
| Feb 1, 2013 | Feb 28, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | Total Coliform Rule |
| Jan 1, 2007 | Dec 31, 2009 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2006 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 10, 2006 | Consumer Confidence Rule |
| Jul 1, 2005 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 22, 2005 | Consumer Confidence Rule |
| Oct 1, 2004 | Dec 31, 2004 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2004 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2004 | Dec 31, 2004 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2004 | Nitrate Rule |
| Jul 1, 2003 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 14, 2003 | Consumer Confidence Rule |
| Jul 1, 2002 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 14, 2003 | Consumer Confidence Rule |
| Jan 1, 2001 | Dec 31, 2001 | 1,1,1-Trichloroethane | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Dec 31, 2001 | Volatile Organic Chemicals |
| Jan 1, 2001 | Dec 31, 2001 | Benzene | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | Volatile Organic Chemicals |
| Jan 1, 2001 | Dec 31, 2001 | 1,1-Dichloroethylene | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Dec 31, 2001 | Volatile Organic Chemicals |
| Jan 1, 2001 | Dec 31, 2001 | 1,1,2-Trichloroethane | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | Volatile Organic Chemicals |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.