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 | Jun 23, 2026 |
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 (325)
This water system has 325 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 | Sep 4, 2025 | - | |
| Jul 1, 2025 | - | RPT | No | No | - | - | - | Resolved | Sep 4, 2025 | - | |
| 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 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| 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 | - | |
| Jan 1, 2025 | Mar 31, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jan 8, 2025 | - | |
| Jan 1, 2025 | Mar 31, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jan 8, 2025 | - | |
| Jan 1, 2025 | Mar 31, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jan 8, 2025 | - | |
| Nov 1, 2024 | - | RPT | No | No | - | - | - | Resolved | Jan 10, 2025 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Dec 16, 2024 | - | |
| Jul 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Feb 20, 2025 | - | |
| 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 | - | MR | No | No | - | TT | - | Resolved | Feb 20, 2025 | - | |
| Jan 1, 2024 | Jan 31, 2024 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2024 | - | |
| Jan 1, 2024 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Jan 1, 2024 | Mar 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2024 | - | |
| 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 | - | |
| Oct 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 13, 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 | - | |
| Apr 1, 2023 | Jun 30, 2023 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 7, 2023 | - | |
| Feb 1, 2023 | - | RPT | No | No | - | - | - | Resolved | Apr 10, 2023 | - | |
| Jan 1, 2023 | Mar 31, 2023 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2023 | - | |
| Jan 1, 2023 | Mar 31, 2023 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 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 | - | |
| 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 | - | |
| Aug 1, 2022 | - | RPT | No | No | - | - | - | Resolved | Sep 16, 2022 | - | |
| Jul 1, 2022 | - | Other | No | No | - | - | - | Resolved | Dec 16, 2024 | - | |
| 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 | - | |
| Jul 1, 2022 | - | Other | No | No | - | - | - | Resolved | Dec 16, 2024 | - |
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.