Sweetwater NTUA
Arizona — Community Water System — PWSID: NN0400399
System Information
| PWSID | NN0400399 |
| System Name | Sweetwater 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 | 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 | 2,014 |
| Service Connections | 589 |
Drinking Water Violations (156)
This water system has 156 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, 2025 | Sep 30, 2025 | MCL | Yes | No | .0107 MG/L | 0.010 mg/L | — | Archived | Sep 30, 2025 | — | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | .01235 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2024 | — | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | .01235 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2024 | — | |
| Apr 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Jan 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | .01348 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2024 | — | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | .01348 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2024 | — | |
| Oct 1, 2023 | — | Other | No | No | — | — | — | Resolved | Oct 1, 2023 | — | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | .0132 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2023 | — | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | .0132 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2023 | — | |
| Oct 1, 2023 | — | Other | No | No | — | — | — | Resolved | Oct 1, 2023 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | .0108 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2023 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | .0108 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2023 | — | |
| Jan 1, 2022 | Mar 31, 2022 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2022 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | .0139 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | .0139 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | .0139 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2021 | — | |
| Jan 1, 2021 | — | Other | No | No | — | — | — | Resolved | Dec 2, 2021 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MCL | Yes | No | .0115 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Oct 1, 2020 | — | Other | No | No | — | — | — | Resolved | Dec 2, 2021 | — | |
| Oct 1, 2020 | — | Other | No | No | — | — | — | Resolved | Aug 27, 2021 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MCL | Yes | No | .0903 MG/L | 0.080 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MCL | Yes | No | .0903 MG/L | 0.080 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MCL | Yes | No | .0903 MG/L | 0.080 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Oct 1, 2020 | — | Other | No | No | — | — | — | Resolved | Aug 27, 2021 | — | |
| Oct 1, 2020 | — | Other | No | No | — | — | — | Resolved | Dec 2, 2021 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MCL | Yes | No | .0115 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MCL | Yes | No | .0115 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Jul 1, 2020 | — | Other | No | No | — | — | — | Resolved | Apr 27, 2021 | — | |
| Jul 1, 2020 | Sep 30, 2020 | MCL | Yes | No | .0115 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2020 | — | |
| Jul 1, 2020 | Sep 30, 2020 | MCL | Yes | No | .0115 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2020 | — | |
| Jul 1, 2020 | Sep 30, 2020 | MCL | Yes | No | .0115 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2020 | — | |
| Jul 1, 2020 | — | Other | No | No | — | — | — | Resolved | Apr 27, 2021 | — | |
| Apr 1, 2020 | — | Other | No | No | — | — | — | Resolved | Apr 27, 2021 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | .0119 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | — | Other | No | No | — | — | — | Resolved | Apr 27, 2021 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | .0119 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | — | Other | No | No | — | — | — | Resolved | Apr 27, 2021 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | .0119 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2020 | — | |
| 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 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Mar 7, 2025 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Mar 7, 2025 | — | |
| 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 | — | |
| Sep 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jul 1, 2016 | — | |
| Sep 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jul 1, 2016 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MCL | Yes | No | .01167 MG/L | 0.010 mg/L | — | Resolved | Jun 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.