Ganado Public Schools
Arizona — Community Water System — PWSID: NN0400289
System Information
| PWSID | NN0400289 |
| System Name | Ganado Public Schools |
| System Type | Community Water System |
| Water Source | Ground Water |
| 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 | Ganado |
| ZIP Code | 86505-1757 |
| Address | PO Box 1757 |
| Organization | Ganado Unified School District #20 |
| Phone | 9287551000 |
Population & Service
| Population Served | 684 |
| Service Connections | 171 |
Drinking Water Violations (395)
This water system has 395 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 | Aug 31, 2025 | MON | No | Yes | — | — | — | Archived | Aug 31, 2025 | — | |
| Jul 1, 2025 | — | RPT | No | No | — | — | — | Unaddressed | — | — | |
| Jun 1, 2025 | — | RPT | No | No | — | — | — | Resolved | Sep 25, 2025 | — | |
| May 1, 2025 | — | RPT | No | No | — | — | — | Resolved | Sep 25, 2025 | — | |
| Apr 1, 2025 | Apr 30, 2025 | MON | No | Yes | — | — | — | Archived | Apr 30, 2025 | — | |
| Apr 1, 2025 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| 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 | — | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2024 | — | |
| Dec 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Aug 1, 2024 | Aug 31, 2024 | MON | No | Yes | — | — | — | Resolved | Aug 31, 2024 | — | |
| Aug 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Jul 1, 2024 | Jul 31, 2024 | MON | No | Yes | — | — | — | Resolved | Jul 31, 2024 | — | |
| Jul 1, 2024 | — | Other | No | No | — | — | — | Resolved | Nov 10, 2025 | — | |
| Jul 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Jul 1, 2024 | — | Other | No | No | — | — | — | Resolved | Nov 10, 2025 | — | |
| Jun 1, 2024 | Jun 30, 2024 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | — | |
| Jun 1, 2024 | Jun 30, 2024 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | — | |
| Jun 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| May 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| May 1, 2024 | May 31, 2024 | MON | No | Yes | — | — | — | Resolved | May 31, 2024 | — | |
| May 1, 2024 | May 31, 2024 | MON | No | Yes | — | — | — | Resolved | May 31, 2024 | — | |
| Apr 1, 2024 | Apr 30, 2024 | MON | No | Yes | — | — | — | Resolved | Apr 30, 2024 | — | |
| Apr 1, 2024 | Apr 30, 2024 | MON | No | Yes | — | — | — | Resolved | Apr 30, 2024 | — | |
| Apr 1, 2024 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Feb 1, 2024 | — | RPT | No | No | — | — | — | Resolved | Mar 19, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 1 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2024 | — | RPT | No | No | — | — | — | Resolved | Mar 19, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 1 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2024 | — | |
| Dec 1, 2023 | Dec 31, 2023 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2023 | — | |
| 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 | — | |
| Sep 1, 2023 | Sep 30, 2023 | MON | No | Yes | — | — | — | Resolved | Sep 30, 2023 | — | |
| Sep 1, 2023 | Sep 30, 2023 | MON | No | Yes | — | — | — | Resolved | Sep 30, 2023 | — | |
| Sep 1, 2023 | — | Other | No | No | — | — | — | Resolved | Jun 13, 2024 | — | |
| Sep 1, 2023 | Sep 30, 2023 | MON | No | Yes | — | — | — | Resolved | Sep 30, 2023 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | — | |
| Aug 1, 2023 | — | Other | No | No | — | — | — | Resolved | Jun 13, 2024 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | — | |
| Jul 1, 2023 | Jul 31, 2023 | MON | No | Yes | — | — | — | Resolved | Jul 31, 2023 | — | |
| Jul 1, 2023 | — | Other | No | No | — | — | — | Resolved | Jun 13, 2024 | — | |
| Jul 1, 2023 | Jul 31, 2023 | MON | No | Yes | — | — | — | Resolved | Jul 31, 2023 | — | |
| Jul 1, 2023 | Jul 31, 2023 | MON | No | Yes | — | — | — | Resolved | Jul 31, 2023 | — | |
| Jul 1, 2022 | — | Other | No | No | — | — | — | Resolved | Feb 10, 2023 | — | |
| Jul 1, 2022 | — | Other | No | No | — | — | — | Resolved | Feb 10, 2023 | — |
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.