Cottonwood Day School BIA
Arizona - Community Water System - PWSID: NN0435004
System Information
| PWSID | NN0435004 |
| System Name | Cottonwood Day 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 | Chinle |
| ZIP Code | 86503 |
| Address | PO Box 6003 |
| Organization | BIA Cottonwood Day School |
| Phone | 9287253256 |
Population & Service
| Population Served | 185 |
| Service Connections | 28 |
Drinking Water Violations (113)
This water system has 113 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mar 1, 2025 | Mar 31, 2025 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2025 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2023 | - | RPT | No | No | - | - | - | Resolved | Nov 30, 2023 | - | |
| Oct 1, 2022 | - | RPT | No | No | - | - | - | Resolved | Nov 17, 2022 | - | |
| May 1, 2020 | - | RPT | No | No | - | - | - | Resolved | Jun 19, 2020 | - | |
| Feb 1, 2018 | Feb 28, 2018 | MON | No | Yes | - | - | - | Resolved | Feb 28, 2018 | - | |
| Feb 1, 2018 | Feb 28, 2018 | MON | No | Yes | - | - | - | Resolved | Feb 28, 2018 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2012 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2012 | - | |
| Oct 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Oct 1, 2012 | Dec 31, 2012 | MCL | Yes | No | .0068 MG/L | 0.006 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Jul 1, 2012 | Sep 30, 2012 | MCL | Yes | No | .0068 MG/L | 0.006 mg/L | - | Resolved | Sep 30, 2012 | - | |
| Apr 1, 2012 | Jun 30, 2012 | MCL | Yes | No | .0068 MG/L | 0.006 mg/L | - | Resolved | Jun 30, 2012 | - | |
| Apr 1, 2012 | Jun 30, 2012 | MCL | Yes | No | .0068 MG/L | 0.006 mg/L | - | Resolved | Jun 30, 2012 | - | |
| Apr 1, 2012 | Jun 30, 2012 | MCL | Yes | No | .0068 MG/L | 0.006 mg/L | - | Resolved | Jun 30, 2012 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Nov 1, 2009 | Nov 30, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Nov 12, 2009 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | - | 0.00000003 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jul 1, 2006 | - | Other | No | No | - | - | - | Resolved | Mar 7, 2009 | - | |
| Jul 1, 2006 | - | Other | No | No | - | - | - | Resolved | Mar 7, 2009 | - | |
| Jul 1, 2006 | - | Other | No | No | - | - | - | Resolved | Mar 7, 2009 | - | |
| Jul 1, 2005 | - | Other | No | No | - | - | - | Resolved | Mar 7, 2009 | - | |
| Jul 1, 2005 | - | Other | No | No | - | - | - | Resolved | Mar 7, 2009 | - | |
| Jul 1, 2005 | - | Other | No | No | - | - | - | Resolved | Mar 7, 2009 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 10 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.0004 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.1 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.002 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | - | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.7 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | - | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.003 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.4 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.07 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.2 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.003 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.075 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.6 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | - | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | No | - | 0.1 mg/L | - | Resolved | Dec 31, 2004 | - |
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.