SRP CORONADO GENERATING STATION
Arizona — Non-Transient Non-Community — PWSID: AZ0401354
System Information
| PWSID | AZ0401354 |
| System Name | SRP CORONADO GENERATING STATION |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Oct 5, 1979 |
| Last Reported | Mar 12, 2026 |
Location & Contact
| State | Arizona |
| City | ST JOHNS |
| ZIP Code | 85936 |
| Address | — |
| Organization | CORONADO GENERATING STATION |
| Phone | 928-337-4131 |
Population & Service
| Population Served | 200 |
| Service Connections | 1 |
Drinking Water Violations (73)
This water system has 73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 1, 2025 | — | RPT | No | No | — | — | — | Resolved | Sep 17, 2025 | — | |
| Aug 1, 2025 | — | RPT | No | No | — | — | — | Resolved | Sep 17, 2025 | — | |
| Jan 1, 2022 | — | RPT | No | No | — | — | — | Resolved | Feb 15, 2022 | — | |
| Jan 1, 2022 | — | RPT | No | No | — | — | — | Resolved | Feb 15, 2022 | — | |
| Jul 1, 2021 | — | RPT | No | No | — | — | — | Resolved | Aug 15, 2021 | — | |
| Jul 1, 2021 | — | RPT | No | No | — | — | — | Resolved | Aug 15, 2021 | — | |
| Jan 1, 2021 | — | MR | No | No | — | TT | — | Resolved | Jan 11, 2021 | — | |
| Jan 1, 2021 | — | MR | No | No | — | TT | — | Resolved | Jan 11, 2021 | — | |
| Jul 1, 2019 | — | RPT | No | No | — | — | — | Resolved | Aug 23, 2019 | — | |
| Jul 1, 2019 | — | RPT | No | No | — | — | — | Resolved | Aug 23, 2019 | — | |
| Jul 1, 2018 | — | RPT | No | No | — | — | — | Resolved | Sep 5, 2018 | — | |
| Jul 1, 2018 | — | RPT | No | No | — | — | — | Resolved | Sep 5, 2018 | — | |
| Aug 1, 2016 | Jul 31, 2017 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jul 31, 2017 | — | |
| Aug 1, 2016 | Jul 31, 2017 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jul 31, 2017 | — | |
| Aug 1, 2016 | Jul 31, 2017 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2017 | — | |
| Aug 1, 2016 | Jul 31, 2017 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2017 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2015 | — | |
| Jan 1, 2013 | Mar 31, 2013 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2013 | — | |
| Jan 1, 2013 | Mar 31, 2013 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2013 | — | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Jan 1, 2011 | Dec 31, 2011 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2011 | — | |
| Jan 1, 2011 | Dec 31, 2011 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2011 | — | |
| Oct 1, 2010 | — | MR | No | No | — | TT | — | Resolved | Feb 17, 2011 | — | |
| Oct 1, 2010 | — | MR | No | No | — | TT | — | Resolved | Feb 17, 2011 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2010 | — | |
| May 1, 2009 | May 31, 2009 | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2009 | — | |
| May 1, 2009 | May 31, 2009 | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2009 | — | |
| Apr 1, 2009 | Apr 30, 2009 | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2009 | — | |
| Apr 1, 2009 | Apr 30, 2009 | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2009 | — | |
| May 1, 2008 | May 31, 2008 | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2008 | — | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2005 | — | |
| Oct 1, 2004 | — | MR | No | No | — | TT | — | Resolved | Jul 28, 2008 | — | |
| Apr 1, 2004 | Jun 30, 2004 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 2004 | — | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2004 | — | |
| Jan 1, 2004 | Mar 31, 2004 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2004 | — | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2004 | — | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2004 | — | |
| Nov 1, 2002 | Nov 30, 2002 | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2002 | — | |
| Jan 1, 2002 | Dec 31, 2002 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2002 | — | |
| Nov 1, 2001 | Nov 30, 2001 | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 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 | — | 0.005 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 | — | 0.07 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 | — | 0.7 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.