KOBUK WATER SYSTEM
Alaska — Community Water System — PWSID: AK2340565
System Information
| PWSID | AK2340565 |
| System Name | KOBUK 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 | Jul 11, 1984 |
| Last Reported | Dec 19, 2025 |
Location & Contact
| State | Alaska |
| City | KOBUK |
| ZIP Code | 99751-0019 |
| Address | P.O. BOX 51020 |
| Organization | CITY OF KOBUK |
| Phone | 907-948-2217 |
Population & Service
| Population Served | 93 |
| Service Connections | 31 |
Drinking Water Violations (747)
This water system has 747 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 1, 2025 | Aug 31, 2025 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Aug 31, 2025 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Aug 1, 2025 | Aug 31, 2025 | Groundwater Rule | MR | No | Yes | — | — | — | Archived | Aug 31, 2025 | Ground Water Rule |
| Aug 1, 2025 | Aug 31, 2025 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Aug 31, 2025 | Revised Total Coliform Rule |
| May 1, 2025 | May 31, 2025 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | May 31, 2025 | Ground Water Rule |
| Apr 1, 2025 | Apr 30, 2025 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Apr 30, 2025 | Ground Water Rule |
| Feb 1, 2025 | Feb 28, 2025 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Feb 28, 2025 | Ground Water Rule |
| Jan 1, 2025 | Jan 31, 2025 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jan 31, 2025 | Revised Total Coliform Rule |
| Jan 1, 2025 | Jan 31, 2025 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jan 31, 2025 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Dec 1, 2024 | Dec 31, 2024 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2024 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Dec 1, 2024 | Dec 31, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Dec 31, 2024 | Revised Total Coliform Rule |
| Oct 1, 2024 | Oct 31, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Oct 31, 2024 | Revised Total Coliform Rule |
| Oct 1, 2024 | Oct 31, 2024 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Oct 31, 2024 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Sep 1, 2024 | Sep 30, 2024 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Sep 30, 2024 | Ground Water Rule |
| Aug 1, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | May 15, 2025 | Ground Water Rule |
| Jul 1, 2024 | Jul 31, 2024 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Jul 31, 2024 | Ground Water Rule |
| Jun 1, 2024 | Jun 30, 2024 | Groundwater Rule | MR | No | No | — | — | — | Resolved | Jun 30, 2024 | Ground Water Rule |
| May 1, 2024 | May 31, 2024 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | May 31, 2024 | Ground Water Rule |
| Apr 2, 2024 | — | Public Notice | Other | No | No | — | — | — | Resolved | May 10, 2024 | Public Notice Rule and Revised PN Rule |
| Apr 1, 2024 | Apr 30, 2024 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Apr 30, 2024 | Ground Water Rule |
| Mar 1, 2024 | Mar 31, 2024 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 2024 | Ground Water Rule |
| Mar 1, 2024 | Mar 31, 2024 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 2024 | Ground Water Rule |
| Mar 1, 2024 | Mar 31, 2024 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Mar 31, 2024 | Ground Water Rule |
| Feb 1, 2024 | Feb 29, 2024 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Feb 29, 2024 | Ground Water Rule |
| Feb 1, 2024 | Feb 29, 2024 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Feb 29, 2024 | Ground Water Rule |
| Feb 1, 2024 | Feb 29, 2024 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Feb 29, 2024 | Ground Water Rule |
| Jan 1, 2024 | Jan 31, 2024 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 31, 2024 | Ground Water Rule |
| Jan 1, 2024 | Jan 31, 2024 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 31, 2024 | Ground Water Rule |
| Jan 1, 2024 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Unaddressed | — | Lead and Copper Rule |
| Jan 1, 2024 | Jan 31, 2024 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 31, 2024 | Ground Water Rule |
| Nov 1, 2023 | Nov 30, 2023 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Nov 30, 2023 | Ground Water Rule |
| Nov 1, 2023 | Nov 30, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Nov 30, 2023 | Revised Total Coliform Rule |
| Oct 1, 2023 | Dec 31, 2023 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 4, 2023 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2023 | Oct 31, 2023 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Oct 31, 2023 | Ground Water Rule |
| Aug 1, 2023 | Aug 31, 2023 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Aug 31, 2023 | Ground Water Rule |
| Jul 1, 2023 | Jul 31, 2023 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Jul 31, 2023 | Ground Water Rule |
| Jun 1, 2023 | Jun 30, 2023 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Jun 30, 2023 | Ground Water Rule |
| May 1, 2023 | May 31, 2023 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | May 31, 2023 | Ground Water Rule |
| Apr 1, 2023 | Jun 30, 2023 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | May 2, 2023 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2023 | Apr 30, 2023 | Groundwater Rule | MR | No | No | — | — | — | Resolved | Apr 30, 2023 | Ground Water Rule |
| Feb 26, 2023 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jun 30, 2023 | Public Notice Rule and Revised PN Rule |
| Feb 26, 2023 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jun 30, 2023 | Public Notice Rule and Revised PN Rule |
| Feb 26, 2023 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jun 30, 2023 | Public Notice Rule and Revised PN Rule |
| Feb 26, 2023 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jun 30, 2023 | Public Notice Rule and Revised PN Rule |
| Feb 26, 2023 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jun 30, 2023 | Public Notice Rule and Revised PN Rule |
| Feb 26, 2023 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jun 30, 2023 | Public Notice Rule and Revised PN Rule |
| Feb 1, 2023 | Feb 28, 2023 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Feb 28, 2023 | Ground Water Rule |
| Jan 1, 2023 | Dec 31, 2023 | cis-1,2-Dichloroethylene | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Dec 31, 2023 | Volatile Organic Chemicals |
| Jan 1, 2023 | Dec 31, 2023 | 1,1-Dichloroethylene | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Dec 31, 2023 | Volatile Organic Chemicals |
| Jan 1, 2023 | Dec 31, 2023 | cis-1,2-Dichloroethylene | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Dec 31, 2023 | Volatile Organic Chemicals |
| Jan 1, 2023 | Dec 31, 2023 | DICHLOROMETHANE | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2023 | Volatile Organic Chemicals |
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.