Mittenrock NTUA
Arizona - Community Water System - PWSID: NN3503057
System Information
| PWSID | NN3503057 |
| System Name | Mittenrock 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 | 352 |
| Service Connections | 103 |
Drinking Water Violations (95)
This water system has 95 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2017 | - | Other | No | No | - | - | - | Resolved | May 19, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | .0107 MG/L | 0.010 mg/L | - | Resolved | Feb 6, 2017 | - | |
| Oct 1, 2016 | Dec 31, 2016 | MCL | Yes | No | .0105 MG/L | 0.010 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Oct 1, 2016 | Dec 31, 2016 | MCL | Yes | No | .0105 MG/L | 0.010 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .0109 MG/L | 0.010 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .0109 MG/L | 0.010 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Oct 1, 2015 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2016 | - | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .0109 MG/L | 0.010 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Oct 1, 2015 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2016 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jan 1, 2014 | Mar 31, 2014 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Mar 31, 2014 | - | |
| Jan 1, 2014 | Mar 31, 2014 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Mar 31, 2014 | - | |
| Jan 1, 2014 | Mar 31, 2014 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Mar 31, 2014 | - | |
| Oct 1, 2013 | - | MR | No | Yes | - | - | - | Resolved | Oct 8, 2025 | - | |
| Oct 1, 2013 | - | MR | No | Yes | - | - | - | Resolved | Oct 8, 2025 | - | |
| Oct 1, 2013 | - | MR | No | Yes | - | - | - | Resolved | Oct 8, 2025 | - | |
| Apr 1, 2013 | Jun 30, 2013 | MCL | Yes | No | .01075 MG/L | 0.010 mg/L | - | Resolved | Jun 30, 2013 | - | |
| Jan 1, 2013 | Mar 31, 2013 | MCL | Yes | No | .01075 MG/L | 0.010 mg/L | - | Resolved | Mar 31, 2013 | - | |
| Jan 1, 2013 | Mar 31, 2013 | MCL | Yes | No | .01075 MG/L | 0.010 mg/L | - | Resolved | Mar 31, 2013 | - | |
| Jan 1, 2013 | Mar 31, 2013 | MCL | Yes | No | .01075 MG/L | 0.010 mg/L | - | Resolved | Mar 31, 2013 | - | |
| 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, 2013 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2010 | Dec 31, 2010 | MCL | Yes | No | .0123 MG/L | 0.010 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Oct 1, 2010 | Dec 31, 2010 | MCL | Yes | No | 449 MG/L | 4.0 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.6 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.0004 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.001 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.003 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.5 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2010 | - |
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.