Dilcon Community Boarding School BIA
Arizona — Community Water System — PWSID: NN0436006
System Information
| PWSID | NN0436006 |
| System Name | Dilcon Community Boarding School BIA |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Federal |
| EPA Region | 09 |
| Serves School | Yes |
| Wholesaler | No |
| First Reported | Feb 2, 1984 |
| Last Reported | Dec 31, 2025 |
Location & Contact
| State | Arizona |
| City | Winslow |
| ZIP Code | 86047 |
| Address | HC 63 Box G |
| Organization | BIA Dilcon Community School, Inc |
| Phone | 9286573211 |
Population & Service
| Population Served | 473 |
| Service Connections | 60 |
Drinking Water Violations (114)
This water system has 114 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2025 | Jun 30, 2025 | MR | No | Yes | — | 0.010 mg/L | — | Archived | Jun 30, 2025 | — | |
| Mar 1, 2025 | — | Other | No | No | — | — | — | Unaddressed | — | — | |
| Mar 1, 2025 | Mar 31, 2025 | MON | No | Yes | — | — | — | Resolved | Mar 31, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2025 | — | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Nov 13, 2024 | — | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 30, 2024 | — | |
| Jan 1, 2024 | — | Other | No | No | — | — | — | Resolved | Dec 21, 2023 | — | |
| Jan 1, 2024 | Mar 31, 2024 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Resolved | Nov 13, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 13, 2024 | — | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | .012 MG/L | 0.010 mg/L | — | Resolved | Mar 31, 2024 | — | |
| Oct 1, 2023 | — | RPT | No | No | — | — | — | Resolved | Nov 30, 2023 | — | |
| Oct 1, 2022 | — | RPT | No | No | — | — | — | Resolved | Nov 17, 2022 | — | |
| Jan 1, 2021 | Jan 31, 2021 | MON | No | Yes | — | — | — | Resolved | Jan 31, 2021 | — | |
| May 1, 2020 | — | RPT | No | No | — | — | — | Resolved | Jun 19, 2020 | — | |
| Apr 1, 2020 | Apr 30, 2020 | MON | No | Yes | — | — | — | Resolved | Apr 30, 2020 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Jul 18, 2018 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Jul 18, 2018 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Jul 18, 2018 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .0103 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2015 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .0103 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2015 | — | |
| Oct 1, 2015 | Dec 31, 2015 | MCL | Yes | No | .0103 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2015 | — | |
| Jul 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jan 21, 2016 | — | |
| Jul 1, 2015 | Sep 30, 2015 | MCL | Yes | No | .0105 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2015 | — | |
| Jul 1, 2015 | Sep 30, 2015 | MCL | Yes | No | .0105 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2015 | — | |
| Jul 1, 2015 | Sep 30, 2015 | MCL | Yes | No | .0105 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2015 | — | |
| Apr 1, 2015 | Jun 30, 2015 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Jun 18, 2015 | — | |
| Apr 1, 2015 | Jun 30, 2015 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Jun 18, 2015 | — | |
| Jan 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jun 28, 2015 | — | |
| Jan 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jun 28, 2015 | — | |
| Jan 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jun 28, 2015 | — | |
| Jan 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jun 28, 2015 | — | |
| Jan 1, 2015 | Mar 31, 2015 | MCL | Yes | No | .0113 MG/L | 0.010 mg/L | — | Resolved | Mar 18, 2015 | — | |
| Jan 1, 2015 | Mar 31, 2015 | MCL | Yes | No | .0113 MG/L | 0.010 mg/L | — | Resolved | Mar 18, 2015 | — | |
| Jan 1, 2015 | Mar 31, 2015 | MCL | Yes | No | .0113 MG/L | 0.010 mg/L | — | Resolved | Mar 18, 2015 | — | |
| Oct 1, 2014 | Dec 31, 2014 | MCL | Yes | No | .01133 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2014 | — | |
| Oct 1, 2014 | Dec 31, 2014 | MCL | Yes | No | .01133 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2014 | — | |
| Oct 1, 2014 | Dec 31, 2014 | MCL | Yes | No | .01133 MG/L | 0.010 mg/L | — | Resolved | Dec 31, 2014 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jun 23, 2015 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jun 23, 2015 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jun 23, 2015 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jun 23, 2015 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | .0117 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | .0117 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | .0117 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | .0117 MG/L | 0.010 mg/L | — | Resolved | Sep 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MCL | Yes | No | .012 MG/L | 0.010 mg/L | — | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MCL | Yes | No | .012 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.