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 | Mar 12, 2026 |
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 (32)
This water system has 32 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 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | — | |
| Feb 1, 2013 | Feb 28, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | — | |
| Jan 1, 2007 | Dec 31, 2009 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jul 1, 2006 | — | Other | No | No | — | — | — | Resolved | Jul 10, 2006 | — | |
| Jul 1, 2005 | — | Other | No | No | — | — | — | Resolved | Jul 22, 2005 | — | |
| Oct 1, 2004 | Dec 31, 2004 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2004 | — | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2004 | — | |
| Jul 1, 2003 | — | Other | No | No | — | — | — | Resolved | Jul 14, 2003 | — | |
| Jul 1, 2002 | — | Other | No | No | — | — | — | Resolved | Jul 14, 2003 | — | |
| Apr 1, 2002 | Jun 30, 2002 | MR | No | Yes | — | 0.004 mg/L | — | Resolved | Jun 30, 2002 | — | |
| Jan 1, 2002 | Mar 31, 2002 | MR | No | Yes | — | 0.004 mg/L | — | Resolved | Mar 31, 2002 | — | |
| Oct 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.004 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.7 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 1 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.075 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.6 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2001 | — | |
| Jan 1, 2001 | Dec 31, 2001 | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Dec 31, 2001 | — |
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.