Twin Arrows NTUA
Arizona - Non-Transient Non-Community - PWSID: NN0400822
System Information
| PWSID | NN0400822 |
| System Name | Twin Arrows NTUA |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | May 23, 2013 |
| 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 | 25 |
| Service Connections | 1 |
Drinking Water Violations (90)
This water system has 90 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2020 | Sep 30, 2020 | MR | No | Yes | - | 10 mg/L | - | Resolved | Sep 30, 2020 | - | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 2020 | - | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 2020 | - | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 2020 | - | |
| Jan 1, 2020 | Mar 31, 2020 | MR | No | Yes | - | 10 mg/L | - | Resolved | Mar 31, 2020 | - | |
| Jan 1, 2020 | Mar 31, 2020 | MR | No | Yes | - | 10 mg/L | - | Resolved | Mar 31, 2020 | - | |
| Jan 1, 2020 | Mar 31, 2020 | MR | No | Yes | - | 10 mg/L | - | Resolved | Mar 31, 2020 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MR | No | Yes | - | 10 mg/L | - | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MR | No | Yes | - | 10 mg/L | - | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MR | No | Yes | - | 10 mg/L | - | Resolved | Mar 31, 2017 | - | |
| Apr 1, 2016 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Apr 1, 2016 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2013 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.02 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Sep 30, 2014 | - |
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.