Tsehootsooi Middle School
Arizona — Community Water System — PWSID: NN0400181
System Information
| PWSID | NN0400181 |
| System Name | Tsehootsooi Middle School |
| System Type | Community Water System |
| Water Source | Ground Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | Yes |
| Wholesaler | No |
| First Reported | Feb 2, 1984 |
| Last Reported | Dec 31, 2025 |
Location & Contact
| State | Arizona |
| City | Fort Defiance |
| ZIP Code | 86504 |
| Address | PO Box 559 |
| Organization | Window Rock Unified School District #8 |
| Phone | 9287296706 |
Population & Service
| Population Served | 875 |
| Service Connections | 116 |
Drinking Water Violations (309)
This water system has 309 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 | — | — | — | Unaddressed | — | — | |
| Jul 1, 2025 | — | RPT | No | No | — | — | — | Unaddressed | — | — | |
| Jun 1, 2025 | — | RPT | No | No | — | — | — | Resolved | Sep 17, 2025 | — | |
| May 1, 2025 | — | RPT | No | No | — | — | — | Resolved | Sep 17, 2025 | — | |
| Apr 1, 2025 | — | RPT | No | No | — | — | — | Resolved | Sep 17, 2025 | — | |
| Mar 1, 2025 | Mar 31, 2025 | MON | No | Yes | — | — | — | Resolved | Mar 31, 2025 | — | |
| Mar 1, 2025 | Mar 31, 2025 | MON | No | Yes | — | — | — | Resolved | Mar 31, 2025 | — | |
| Mar 1, 2025 | Mar 31, 2025 | MON | No | Yes | — | — | — | Resolved | Mar 31, 2025 | — | |
| Mar 1, 2025 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Nov 1, 2024 | — | RPT | No | No | — | — | — | Resolved | Jan 10, 2025 | — | |
| Jul 1, 2024 | — | MR | No | No | — | TT | — | Resolved | Feb 20, 2025 | — | |
| Jul 1, 2024 | — | Other | No | No | — | — | — | Resolved | Dec 16, 2024 | — | |
| Jul 1, 2024 | — | MR | No | No | — | TT | — | Resolved | Feb 20, 2025 | — | |
| Jun 1, 2024 | — | RPT | No | No | — | — | — | Resolved | Aug 8, 2024 | — | |
| May 1, 2024 | — | RPT | No | No | — | — | — | Resolved | Aug 9, 2024 | — | |
| Apr 1, 2024 | — | RPT | No | No | — | — | — | Resolved | Aug 8, 2024 | — | |
| Mar 1, 2024 | Mar 31, 2024 | MON | No | Yes | — | — | — | Resolved | Mar 31, 2024 | — | |
| Mar 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Feb 1, 2024 | Feb 29, 2024 | MON | No | Yes | — | — | — | Resolved | Feb 29, 2024 | — | |
| Feb 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Jan 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Jan 1, 2024 | Jan 31, 2024 | MON | No | Yes | — | — | — | Resolved | Jan 31, 2024 | — | |
| Jan 1, 2024 | — | MR | No | No | — | TT | — | Resolved | Feb 20, 2025 | — | |
| Nov 1, 2023 | Nov 30, 2023 | MON | No | Yes | — | — | — | Resolved | Nov 30, 2023 | — | |
| Oct 1, 2023 | Oct 31, 2023 | MON | No | Yes | — | — | — | Resolved | Oct 31, 2023 | — | |
| Aug 1, 2023 | — | RPT | No | No | — | — | — | Resolved | Sep 20, 2023 | — | |
| Jul 1, 2023 | — | Other | No | No | — | — | — | Resolved | Dec 16, 2024 | — | |
| Jul 1, 2023 | — | Other | No | No | — | — | — | Resolved | Dec 16, 2024 | — | |
| May 1, 2023 | — | RPT | No | No | — | — | — | Resolved | Aug 10, 2023 | — | |
| Feb 1, 2023 | — | RPT | No | No | — | — | — | Resolved | Apr 10, 2023 | — | |
| Jan 1, 2023 | — | RPT | No | No | — | — | — | Resolved | Apr 10, 2023 | — | |
| Dec 1, 2022 | — | Other | No | No | — | — | — | Resolved | Dec 16, 2024 | — | |
| Dec 1, 2022 | — | Other | No | No | — | — | — | Resolved | Dec 16, 2024 | — | |
| Dec 1, 2022 | Dec 31, 2022 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2022 | — | |
| Dec 1, 2022 | Dec 31, 2022 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2022 | — | |
| Aug 1, 2022 | — | RPT | No | No | — | — | — | Resolved | Sep 16, 2022 | — | |
| Jul 1, 2022 | — | Other | No | No | — | — | — | Resolved | Dec 16, 2024 | — | |
| Jul 1, 2022 | — | Other | No | No | — | — | — | Resolved | Dec 16, 2024 | — | |
| Apr 1, 2022 | Apr 30, 2022 | MON | No | Yes | — | — | — | Resolved | Apr 30, 2022 | — | |
| Apr 1, 2022 | — | Other | No | No | — | — | — | Resolved | Dec 16, 2024 | — | |
| Apr 1, 2022 | — | Other | No | No | — | — | — | Resolved | Dec 16, 2024 | — | |
| Aug 1, 2021 | Aug 31, 2021 | MON | No | Yes | — | — | — | Resolved | Aug 31, 2021 | — | |
| Dec 1, 2020 | Dec 31, 2020 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2020 | — | |
| Nov 1, 2020 | Nov 30, 2020 | MON | No | Yes | — | — | — | Resolved | Nov 30, 2020 | — | |
| Jul 1, 2020 | — | Other | No | No | — | — | — | Resolved | Apr 19, 2021 | — | |
| Jul 1, 2020 | Jul 31, 2020 | MON | No | Yes | — | — | — | Resolved | Jul 31, 2020 | — | |
| Jul 1, 2020 | — | Other | No | No | — | — | — | Resolved | Apr 19, 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 | — | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2020 | — |
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.