Mexican Springs West Rural NTUA
Arizona - Community Water System - PWSID: NN3500267
System Information
| PWSID | NN3500267 |
| System Name | Mexican Springs West Rural NTUA |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 2, 1984 |
| Last Reported | Dec 31, 2025 |
Location & Contact
| State | Arizona |
| City | Ft Defiance |
| ZIP Code | 86504 |
| Address | Office of Deputy General Manager |
| Organization | Navajo Tribal Utility Authority |
| Phone | 9287296277 |
Population & Service
| Population Served | 257 |
| Service Connections | 75 |
Drinking Water Violations (56)
This water system has 56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2016 | - | Other | No | No | - | - | - | Resolved | Sep 30, 2025 | - | |
| Apr 1, 2016 | - | Other | No | No | - | - | - | Resolved | Sep 30, 2025 | - | |
| Sep 1, 2015 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2016 | - | |
| Sep 1, 2015 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2016 | - | |
| Sep 1, 2015 | Sep 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2015 | - | |
| Sep 1, 2015 | Sep 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2015 | - | |
| Sep 1, 2015 | Sep 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2015 | - | |
| Oct 1, 2013 | - | MR | No | Yes | - | - | - | Resolved | Feb 18, 2025 | - | |
| Oct 1, 2013 | - | MR | No | Yes | - | - | - | Resolved | Feb 18, 2025 | - | |
| Oct 1, 2013 | - | MR | No | Yes | - | - | - | Resolved | Feb 18, 2025 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2012 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2012 | - | |
| Nov 1, 2012 | Nov 30, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2012 | - | |
| Jan 1, 2011 | Dec 31, 2011 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jun 13, 2010 | - | |
| Jan 1, 2011 | Dec 31, 2011 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jun 13, 2010 | - | |
| Jan 1, 2011 | Dec 31, 2011 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jun 13, 2010 | - | |
| Jan 1, 2011 | Dec 31, 2011 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 13, 2010 | - | |
| Jan 1, 2011 | Dec 31, 2011 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 13, 2010 | - | |
| Jan 1, 2011 | Dec 31, 2011 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 13, 2010 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.075 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.6 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2005 | Dec 31, 2010 | MR | No | Yes | - | 0.007 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Dec 1, 2001 | Dec 31, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Dec 17, 2001 | - | |
| Dec 1, 2001 | Dec 31, 2001 | MR | No | Yes | - | 5% of samples | - | Archived | Dec 31, 2001 | - | |
| Dec 1, 2001 | Dec 31, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Dec 17, 2001 | - | |
| Nov 2, 1999 | Nov 1, 2000 | MCL | Yes | No | .01 | 0.002 mg/L | - | Archived | Nov 1, 2000 | - | |
| Nov 2, 1999 | Nov 1, 2000 | MCL | Yes | No | .01 MG/L | 0.002 mg/L | - | Resolved | Nov 1, 2000 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - |
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.