KOYUK PUBLIC WATER SYSTEM
Alaska — Community Water System — PWSID: AK2340167
System Information
| PWSID | AK2340167 |
| System Name | KOYUK PUBLIC WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Ground Water Under Influence |
| 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 | KOYUK |
| ZIP Code | 99753 |
| Address | PO Box 53093 |
| Organization | SAVETILIK, APRIL |
| Phone | 907-963-2456 |
Population & Service
| Population Served | 277 |
| Service Connections | 79 |
Drinking Water Violations (918)
This water system has 918 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2025 | Jul 31, 2025 | MON | No | Yes | — | — | — | Resolved | Jul 31, 2025 | — | |
| Jul 1, 2025 | Jul 31, 2025 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jul 31, 2025 | — | |
| Jul 1, 2025 | Jul 31, 2025 | MR | No | Yes | — | — | — | Resolved | Jul 31, 2025 | — | |
| May 1, 2025 | May 31, 2025 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | May 31, 2025 | — | |
| May 1, 2025 | May 31, 2025 | MR | No | Yes | — | — | — | Resolved | May 31, 2025 | — | |
| May 1, 2025 | May 31, 2025 | MON | No | Yes | — | — | — | Resolved | May 31, 2025 | — | |
| Nov 1, 2024 | Nov 30, 2024 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Nov 30, 2024 | — | |
| Nov 1, 2024 | Nov 30, 2024 | MR | No | Yes | — | — | — | Resolved | Nov 30, 2024 | — | |
| Nov 1, 2024 | Nov 30, 2024 | MON | No | Yes | — | — | — | Resolved | Nov 30, 2024 | — | |
| Oct 17, 2024 | — | RPT | No | No | — | — | — | Resolved | Jun 11, 2025 | — | |
| Oct 17, 2024 | — | RPT | No | No | — | — | — | Resolved | Jun 11, 2025 | — | |
| Oct 17, 2024 | — | TT | Yes | No | — | — | — | Resolved | Jun 11, 2025 | — | |
| Oct 17, 2024 | — | TT | Yes | No | — | — | — | Resolved | Jun 11, 2025 | — | |
| Oct 1, 2024 | Oct 31, 2024 | MR | No | No | — | — | — | Resolved | Oct 31, 2024 | — | |
| Oct 1, 2024 | Oct 31, 2024 | MR | No | No | — | — | — | Resolved | Oct 31, 2024 | — | |
| Apr 1, 2024 | Apr 30, 2024 | TT | Yes | No | — | — | — | Resolved | Apr 30, 2024 | — | |
| Apr 1, 2024 | Apr 30, 2024 | TT | Yes | No | — | — | — | Resolved | Apr 30, 2024 | — | |
| Apr 1, 2024 | Apr 30, 2024 | TT | Yes | No | — | — | — | Resolved | Apr 30, 2024 | — | |
| Apr 1, 2024 | Apr 30, 2024 | MR | No | Yes | — | — | — | Resolved | Apr 30, 2024 | — | |
| Jul 1, 2023 | — | Other | No | No | — | — | — | Resolved | Jul 13, 2023 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Aug 7, 2023 | — | |
| Jul 1, 2023 | Jul 31, 2023 | MON | No | Yes | — | — | — | Resolved | Jul 31, 2023 | — | |
| Jul 1, 2023 | Jul 31, 2023 | MR | No | Yes | — | — | — | Resolved | Jul 31, 2023 | — | |
| Apr 1, 2023 | Jun 30, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | May 8, 2023 | — | |
| Apr 1, 2023 | Apr 30, 2023 | MR | No | Yes | — | — | — | Resolved | Apr 30, 2023 | — | |
| Apr 1, 2023 | Apr 30, 2023 | MON | No | Yes | — | — | — | Resolved | Apr 30, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MON | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MON | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MON | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MON | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Jan 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2023 | — | |
| Jan 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2023 | — | |
| Jan 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2023 | — | |
| Nov 1, 2022 | Nov 30, 2022 | MON | No | Yes | — | — | — | Resolved | Nov 30, 2022 | — | |
| Nov 1, 2022 | Nov 30, 2022 | MR | No | Yes | — | — | — | Resolved | Nov 30, 2022 | — | |
| Oct 1, 2022 | Oct 31, 2022 | TT | Yes | No | — | — | — | Resolved | Oct 31, 2022 | — | |
| Oct 1, 2022 | Oct 31, 2022 | TT | Yes | No | — | — | — | Resolved | Oct 31, 2022 | — | |
| Oct 1, 2022 | Oct 31, 2022 | TT | Yes | No | — | — | — | Resolved | Oct 31, 2022 | — | |
| Oct 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 7, 2022 | — | |
| Jul 1, 2022 | Jul 31, 2022 | TT | Yes | No | — | — | — | Resolved | Jul 31, 2022 | — | |
| Jul 1, 2022 | Jul 31, 2022 | TT | Yes | No | — | — | — | Resolved | Jul 31, 2022 | — | |
| Jul 1, 2022 | Jul 31, 2022 | TT | Yes | No | — | — | — | Resolved | Jul 31, 2022 | — | |
| Apr 1, 2022 | Apr 30, 2022 | MR | No | Yes | — | — | — | Resolved | Apr 30, 2022 | — | |
| Mar 1, 2022 | Mar 31, 2022 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2022 | — | |
| Feb 1, 2022 | Feb 28, 2022 | MR | No | Yes | — | — | — | Resolved | Feb 28, 2022 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Jan 1, 2022 | — | MR | No | No | — | TT | — | Resolved | Dec 16, 2022 | — |
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.