Mexican Water NTUA
Arizona — Community Water System — PWSID: NN4903072
System Information
| PWSID | NN4903072 |
| System Name | Mexican Water NTUA |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Dec 1, 2005 |
| 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 | 294 |
| Service Connections | 86 |
Drinking Water Violations (141)
This water system has 141 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, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | .01128 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2024 | — | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | .01128 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2024 | — | |
| Jan 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | .01193 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2024 | — | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | .01193 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2024 | — | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | .01193 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2024 | — | |
| Oct 1, 2023 | — | Other | No | No | — | — | — | Resolved | Dec 12, 2023 | — | |
| Oct 1, 2023 | — | Other | No | No | — | — | — | Resolved | Dec 12, 2023 | — | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | .0117 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2023 | — | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | .0117 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2023 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | .012 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2023 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | .012 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2023 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | .012 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2023 | — | |
| Jul 1, 2022 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Jul 1, 2022 | Sep 30, 2022 | MCL | Yes | No | .0118 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2022 | — | |
| Jul 1, 2022 | Sep 30, 2022 | MCL | Yes | No | .0118 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2022 | — | |
| Apr 1, 2022 | — | Other | No | No | — | — | — | Resolved | Dec 12, 2023 | — | |
| Apr 1, 2022 | — | Other | No | No | — | — | — | Resolved | Dec 12, 2023 | — | |
| Apr 1, 2022 | Jun 30, 2022 | MCL | Yes | No | .0143 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2022 | — | |
| Apr 1, 2022 | Jun 30, 2022 | MCL | Yes | No | .0143 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2022 | — | |
| Jan 1, 2022 | Mar 31, 2022 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2022 | — | |
| Jan 1, 2022 | Mar 31, 2022 | MCL | Yes | No | .0114 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2022 | — | |
| Jan 1, 2022 | — | Other | No | No | — | — | — | Resolved | Jul 1, 2023 | — | |
| Jan 1, 2022 | — | Other | No | No | — | — | — | Resolved | Jul 1, 2023 | — | |
| Oct 1, 2021 | — | Other | No | No | — | — | — | Resolved | Oct 25, 2022 | — | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | .0114 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2021 | — | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | .0114 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2021 | — | |
| Jun 1, 2021 | Jun 30, 2021 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2021 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .0109 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .0109 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | — | Other | No | No | — | — | — | Resolved | Oct 25, 2022 | — | |
| Jul 1, 2019 | — | Other | No | No | — | — | — | Resolved | Oct 25, 2022 | — | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Feb 12, 2019 | — | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Feb 12, 2019 | — | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Feb 12, 2019 | — | |
| Jul 1, 2016 | Sep 30, 2016 | MCL | Yes | No | .0108 MG/L | 0.010 mg/L | — | Resolved | Jan 1, 2016 | — | |
| Jul 1, 2016 | Sep 30, 2016 | MCL | Yes | No | .0108 MG/L | 0.010 mg/L | — | Resolved | Jan 1, 2016 | — | |
| Apr 1, 2016 | Jun 30, 2016 | MCL | Yes | No | .0133 MG/L | 0.010 mg/L | — | Resolved | Jan 1, 2016 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Mar 7, 2025 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Mar 7, 2025 | — | |
| Apr 1, 2016 | Jun 30, 2016 | MCL | Yes | No | .0133 MG/L | 0.010 mg/L | — | Resolved | Jan 1, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MCL | Yes | No | .0133 MG/L | 0.010 mg/L | — | Resolved | Jan 1, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MCL | Yes | No | .0133 MG/L | 0.010 mg/L | — | Resolved | Jan 1, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MCL | Yes | No | .0133 MG/L | 0.010 mg/L | — | Resolved | Jan 1, 2016 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .013 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2015 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .013 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2015 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .013 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2015 | — | |
| Oct 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jul 1, 2016 | — | |
| Oct 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jul 1, 2016 | — |
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.