Navajo National Monument
Arizona - Non-Transient Non-Community - PWSID: NN0400339
System Information
| PWSID | NN0400339 |
| System Name | Navajo National Monument |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Federal |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 2, 1984 |
| Last Reported | Jun 23, 2026 |
Location & Contact
| State | Arizona |
| City | Chinle |
| ZIP Code | 86503 |
| Address | PO Box 588 |
| Organization | Canyon De Chelly National Monument |
| Phone | 9286745500 |
Population & Service
| Population Served | 25 |
| Service Connections | 14 |
Drinking Water Violations (356)
This water system has 356 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 1, 2025 | - | RPT | No | No | - | - | - | Resolved | Aug 7, 2025 | - | |
| Jul 1, 2025 | - | RPT | No | No | - | - | - | Resolved | Jul 2, 2025 | - | |
| Jun 1, 2025 | - | RPT | No | No | - | - | - | Resolved | Sep 17, 2025 | - | |
| Dec 1, 2024 | - | RPT | No | No | - | - | - | Resolved | Feb 14, 2025 | - | |
| Nov 1, 2024 | - | RPT | No | No | - | - | - | Resolved | Feb 14, 2025 | - | |
| Apr 1, 2024 | - | RPT | No | No | - | - | - | Resolved | Aug 21, 2024 | - | |
| Nov 1, 2023 | - | RPT | No | No | - | - | - | Resolved | Jan 10, 2024 | - | |
| Jul 1, 2023 | Sep 30, 2023 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 6, 2023 | - | |
| Jun 1, 2023 | - | RPT | No | No | - | - | - | Resolved | Aug 4, 2023 | - | |
| May 1, 2023 | - | RPT | No | No | - | - | - | Resolved | Aug 16, 2023 | - | |
| Apr 1, 2023 | - | RPT | No | No | - | - | - | Resolved | May 26, 2023 | - | |
| Mar 1, 2023 | - | RPT | No | No | - | - | - | Resolved | May 26, 2023 | - | |
| Feb 1, 2023 | - | RPT | No | No | - | - | - | Resolved | May 26, 2023 | - | |
| Jan 1, 2023 | - | RPT | No | No | - | - | - | Resolved | May 26, 2023 | - | |
| Jan 1, 2023 | Mar 31, 2023 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2023 | - | |
| Oct 1, 2022 | - | RPT | No | No | - | - | - | Resolved | Nov 16, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Sep 1, 2022 | - | RPT | No | No | - | - | - | Resolved | Nov 16, 2022 | - | |
| Aug 1, 2022 | - | RPT | No | No | - | - | - | Resolved | Nov 16, 2022 | - | |
| Jul 1, 2022 | Sep 30, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2022 | - | |
| Jul 1, 2022 | Sep 30, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2022 | - | |
| Jun 1, 2022 | - | RPT | No | No | - | - | - | Resolved | Jul 20, 2022 | - | |
| Apr 1, 2022 | Jun 30, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2022 | - | |
| Jan 1, 2022 | Mar 31, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2022 | - | |
| Nov 1, 2021 | Nov 30, 2021 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2021 | - | |
| Oct 1, 2021 | Oct 31, 2021 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2021 | - | |
| Jan 1, 2021 | - | RPT | No | No | - | - | - | Resolved | Feb 24, 2021 | - | |
| Dec 1, 2020 | - | RPT | No | No | - | - | - | Resolved | Feb 24, 2021 | - | |
| Nov 1, 2020 | - | RPT | No | No | - | - | - | Resolved | Feb 24, 2021 | - | |
| Oct 1, 2020 | - | RPT | No | No | - | - | - | Resolved | Feb 24, 2021 | - | |
| Jun 1, 2020 | Jun 30, 2020 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2020 | - | |
| May 1, 2020 | May 31, 2020 | MON | No | Yes | - | - | - | Resolved | May 31, 2020 | - | |
| Apr 1, 2020 | Apr 30, 2020 | MON | No | Yes | - | - | - | Resolved | Apr 30, 2020 | - | |
| Mar 1, 2020 | - | RPT | No | No | - | - | - | Resolved | May 27, 2020 | - | |
| Feb 1, 2020 | - | RPT | No | No | - | - | - | Resolved | May 27, 2020 | - | |
| Jan 1, 2020 | - | RPT | No | No | - | - | - | Resolved | May 27, 2020 | - | |
| Nov 1, 2019 | - | RPT | No | No | - | - | - | Resolved | Jan 14, 2020 | - | |
| Oct 1, 2019 | - | RPT | No | No | - | - | - | Resolved | Jan 14, 2020 | - | |
| Apr 1, 2019 | - | RPT | No | No | - | - | - | Resolved | Jun 13, 2019 | - | |
| Mar 1, 2019 | - | RPT | No | No | - | - | - | Resolved | Jun 13, 2019 | - | |
| Feb 1, 2019 | - | RPT | No | No | - | - | - | Resolved | Jun 13, 2019 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2017 | Dec 31, 2017 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2017 | - | |
| Dec 1, 2017 | Dec 31, 2017 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2017 | - |
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.