TYONEK WATER SYSTEM
Alaska — Community Water System — PWSID: AK2240472
System Information
| PWSID | AK2240472 |
| System Name | TYONEK WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 7, 1981 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | Alaska |
| City | TYONEK |
| ZIP Code | 99682 |
| Address | Tyonek |
| Organization | STANDIFER, CRYSTAL |
| Phone | 907-583-2201 |
Population & Service
| Population Served | 206 |
| Service Connections | 97 |
Drinking Water Violations (790)
This water system has 790 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2025 | — | MR | No | No | — | TT | — | Resolved | Sep 3, 2025 | — | |
| Jan 1, 2024 | — | MR | No | No | — | TT | — | Resolved | Sep 3, 2025 | — | |
| Sep 22, 2023 | — | MR | No | Yes | — | — | — | Resolved | Oct 26, 2023 | — | |
| Jan 1, 2023 | — | MR | No | No | — | TT | — | Resolved | Sep 3, 2025 | — | |
| Jan 1, 2022 | — | MR | No | No | — | TT | — | Resolved | Sep 3, 2025 | — | |
| Jul 1, 2021 | Jul 31, 2021 | MON | No | Yes | — | — | — | Resolved | Jul 31, 2021 | — | |
| Jul 1, 2021 | Sep 30, 2021 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2021 | — | |
| Jun 1, 2021 | Jun 30, 2021 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2021 | — | |
| May 1, 2021 | May 31, 2021 | MON | No | Yes | — | — | — | Resolved | May 31, 2021 | — | |
| Feb 1, 2021 | Feb 28, 2021 | MON | No | Yes | — | — | — | Resolved | Feb 28, 2021 | — | |
| Jan 1, 2021 | — | MR | No | No | — | TT | — | Resolved | Sep 3, 2025 | — | |
| Jul 1, 2020 | — | Other | No | No | — | — | — | Resolved | Aug 11, 2020 | — | |
| May 1, 2020 | May 31, 2020 | MON | No | Yes | — | — | — | Resolved | May 31, 2020 | — | |
| Jan 1, 2020 | — | MR | No | No | — | TT | — | Resolved | Sep 3, 2025 | — | |
| May 1, 2019 | May 31, 2019 | MON | No | Yes | — | — | — | Resolved | May 31, 2019 | — | |
| Apr 1, 2019 | Jun 30, 2019 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Jan 1, 2019 | Dec 31, 2019 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2019 | — | |
| Oct 1, 2018 | — | Other | No | No | — | — | — | Resolved | Feb 7, 2019 | — | |
| Nov 1, 2017 | Nov 30, 2017 | MON | No | Yes | — | — | — | Resolved | Nov 30, 2017 | — | |
| Jul 1, 2017 | — | Other | No | No | — | — | — | Resolved | Jul 19, 2017 | — | |
| Jul 1, 2017 | — | MR | No | No | — | TT | — | Resolved | Sep 21, 2018 | — | |
| Jan 1, 2017 | — | MR | No | No | — | TT | — | Resolved | Sep 21, 2018 | — | |
| Oct 1, 2016 | — | Other | No | No | — | — | — | Resolved | Nov 14, 2016 | — | |
| Jul 1, 2016 | — | Other | No | No | — | — | — | Resolved | Nov 14, 2016 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Nov 15, 2016 | — | |
| Apr 1, 2016 | — | Other | No | No | — | — | — | Resolved | Nov 15, 2016 | — | |
| Jan 1, 2016 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Aug 1, 2015 | Aug 31, 2015 | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2015 | — | |
| Jul 1, 2015 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jul 1, 2015 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| May 21, 2015 | — | Other | No | No | — | — | — | Resolved | Jun 3, 2019 | — | |
| Jan 1, 2015 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jan 1, 2015 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Oct 2, 2014 | — | Other | No | No | — | — | — | Resolved | Jul 29, 2015 | — | |
| Oct 2, 2014 | — | Other | No | No | — | — | — | Resolved | Jul 29, 2015 | — | |
| Jul 1, 2014 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jul 29, 2015 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jul 29, 2015 | — | |
| Jul 1, 2014 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jul 1, 2014 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jul 29, 2015 | — | |
| Jul 1, 2014 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jan 1, 2014 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jan 1, 2014 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jan 1, 2014 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jan 1, 2014 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jul 1, 2013 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jul 1, 2013 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jul 1, 2013 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — | |
| Jul 1, 2013 | — | MR | No | No | — | TT | — | Resolved | May 2, 2016 | — |
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.