Tsaile-Dine College NTUA
Arizona — Community Water System — PWSID: NN0403005
System Information
| PWSID | NN0403005 |
| System Name | Tsaile-Dine College NTUA |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | Yes |
| 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 | 1,190 |
| Service Connections | 348 |
Drinking Water Violations (124)
This water system has 124 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, 2020 | Dec 31, 2020 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2018 | — | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2018 | — | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2018 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Feb 10, 2025 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Feb 10, 2025 | — | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2015 | — | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2015 | — | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2015 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | .0314 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | .0314 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | .0314 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2014 | — | |
| Jan 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jun 25, 2015 | — | |
| Jan 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jun 25, 2015 | — | |
| Oct 1, 2013 | — | MR | No | Yes | — | — | — | Unaddressed | — | — | |
| Oct 1, 2013 | — | MR | No | Yes | — | — | — | Unaddressed | — | — | |
| 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 | — | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2011 | — | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2011 | — | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2011 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 1 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.004 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 | — | 0.2 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 | — | 0.006 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 | — | 0.1 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 | — | 0.02 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | — | — | 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 | — | 0.1 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.