UNALASKA WATER SYSTEM
Alaska - Community Water System - PWSID: AK2260309
System Information
| PWSID | AK2260309 |
| System Name | UNALASKA WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 7, 1981 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | Alaska |
| City | UNALASKA |
| ZIP Code | 99685 |
| Address | P.O. BOX 610 |
| Organization | HERNANDEZ, ERIK_OP2 |
| Phone | 907-581-1260 |
Population & Service
| Population Served | 9,400 |
| Service Connections | 603 |
Drinking Water Violations (408)
This water system has 408 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | 0.060 mg/L | - | Archived | Dec 31, 2025 | - | |
| Oct 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | 0.080 mg/L | - | Archived | Dec 31, 2025 | - | |
| May 1, 2024 | May 31, 2024 | MR | No | Yes | - | - | - | Resolved | May 31, 2024 | - | |
| May 1, 2024 | May 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | May 31, 2024 | - | |
| May 1, 2024 | May 31, 2024 | MON | No | No | - | - | - | Resolved | May 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 23, 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 | - | 0.060 mg/L | - | Resolved | Dec 23, 2024 | - | |
| Oct 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | TT | - | Resolved | Dec 31, 2023 | - | |
| Jul 1, 2023 | Sep 30, 2023 | MR | No | Yes | - | TT | - | Resolved | Sep 30, 2023 | - | |
| May 1, 2022 | May 31, 2022 | MR | No | Yes | - | - | - | Resolved | May 31, 2022 | - | |
| May 1, 2022 | May 31, 2022 | MON | No | No | - | - | - | Resolved | May 31, 2022 | - | |
| Apr 1, 2022 | Jun 30, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 1, 2022 | - | |
| Nov 1, 2021 | Nov 30, 2021 | MON | No | No | - | - | - | Resolved | Nov 30, 2021 | - | |
| May 1, 2018 | May 31, 2018 | MR | No | Yes | - | - | - | Resolved | May 31, 2018 | - | |
| May 1, 2018 | May 31, 2018 | MON | No | No | - | - | - | Resolved | May 31, 2018 | - | |
| Apr 1, 2018 | Jun 30, 2018 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 1, 2018 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 15 pCi/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 30 ug/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 15 pCi/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 5 pCi/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 30 ug/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 5 pCi/L | - | Archived | Dec 31, 2025 | - | |
| Apr 1, 2015 | Apr 30, 2015 | MR | No | Yes | - | - | - | Resolved | Apr 30, 2015 | - | |
| Apr 1, 2015 | Apr 30, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2015 | - | |
| Mar 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2015 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2015 | - | |
| Oct 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Aug 1, 2014 | Aug 31, 2014 | MR | No | No | - | - | - | Resolved | Aug 31, 2014 | - | |
| Aug 1, 2014 | Aug 31, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2014 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | No | - | 4.0 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2012 | - | |
| Oct 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Dec 1, 2011 | Dec 31, 2011 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2011 | - | |
| Jul 1, 2010 | Jul 31, 2010 | MR | No | No | - | - | - | Resolved | Jul 31, 2010 | - | |
| Jul 1, 2010 | Jul 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2010 | - | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | - | 4.0 mg/L | - | Resolved | Sep 30, 2010 | - | |
| Apr 1, 2010 | Apr 30, 2010 | MR | No | Yes | - | - | - | Resolved | Apr 30, 2010 | - | |
| Feb 1, 2010 | Feb 28, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2010 | - | |
| Jan 1, 2010 | Jan 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2010 | - | |
| Dec 1, 2009 | Dec 31, 2009 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2009 | - | |
| Dec 1, 2009 | Dec 31, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2009 | - | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2009 | - | |
| Aug 1, 2007 | Aug 31, 2007 | MR | No | Yes | - | - | - | Resolved | Aug 31, 2007 | - | |
| Aug 1, 2007 | Aug 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2007 | - | |
| Jan 1, 2004 | Jan 31, 2004 | TT | Yes | No | - | - | - | Resolved | Jan 31, 2004 | - | |
| Mar 1, 2003 | Mar 31, 2003 | TT | Yes | No | - | - | - | Resolved | Mar 31, 2003 | - | |
| Jan 1, 2003 | Jan 31, 2003 | TT | Yes | No | - | - | - | Resolved | Jan 31, 2003 | - | |
| Jan 1, 2003 | Dec 31, 2003 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Dec 31, 2003 | - |
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.