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KOYUK PUBLIC WATER SYSTEM

Alaska — Community Water System — PWSID: AK2340167

System Information

PWSIDAK2340167
System NameKOYUK PUBLIC WATER SYSTEM
System TypeCommunity Water System
Water SourceGround Water Under Influence
Activity StatusActive
Owner TypeNative American
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedFeb 7, 1981
Last ReportedDec 19, 2025

Location & Contact

StateAlaska
CityKOYUK
ZIP Code99753
AddressPO Box 53093
OrganizationSAVETILIK, APRIL
Phone907-963-2456

Population & Service

Population Served277
Service Connections82

Drinking Water Violations (901)

This water system has 901 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 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2025 Surface Water Treatment Rule
Jul 1, 2025 Jul 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2025 Revised Total Coliform Rule
Jul 1, 2025 Jul 31, 2025 Chlorine MR No Yes — 4.0 mg/L — Resolved Jul 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2025 May 31, 2025 Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2025 Surface Water Treatment Rule
May 1, 2025 May 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2025 Revised Total Coliform Rule
May 1, 2025 May 31, 2025 Chlorine MR No Yes — 4.0 mg/L — Resolved May 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2024 Nov 30, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Nov 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2024 Nov 30, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2024 Surface Water Treatment Rule
Nov 1, 2024 Nov 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2024 Revised Total Coliform Rule
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Jun 11, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Jun 11, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Jun 11, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Jun 11, 2025 Lead and Copper Rule Revisions
Oct 1, 2024 Oct 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No No — — — Resolved Oct 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2024 Oct 31, 2024 Surface Water Treatment Rule MR No No — — — Resolved Oct 31, 2024 Surface Water Treatment Rule
Apr 1, 2024 Apr 30, 2024 Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2024 Surface Water Treatment Rule
Apr 1, 2024 Apr 30, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Apr 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2024 Apr 30, 2024 Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2024 Surface Water Treatment Rule
Apr 1, 2024 Apr 30, 2024 Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2024 Surface Water Treatment Rule
Jul 1, 2023 Jul 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2023 Revised Total Coliform Rule
Jul 1, 2023 Sep 30, 2023 Chlorine MR No Yes — 4.0 mg/L — Resolved Aug 7, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 13, 2023 Consumer Confidence Rule
Jul 1, 2023 Jul 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2023 Surface Water Treatment Rule
Apr 1, 2023 Jun 30, 2023 Chlorine MR No Yes — 4.0 mg/L — Resolved May 8, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2023 Apr 30, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Apr 30, 2023 Surface Water Treatment Rule
Apr 1, 2023 Apr 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2023 Revised Total Coliform Rule
Mar 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Mar 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Mar 1, 2023 Mar 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2023 Surface Water Treatment Rule
Mar 1, 2023 Mar 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2023 Surface Water Treatment Rule
Mar 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Mar 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Jan 1, 2023 Mar 31, 2023 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Mar 31, 2023 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Mar 31, 2023 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2022 Nov 30, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2022 Revised Total Coliform Rule
Nov 1, 2022 Nov 30, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2022 Surface Water Treatment Rule
Oct 1, 2022 Oct 31, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Oct 31, 2022 Surface Water Treatment Rule
Oct 1, 2022 Oct 31, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Oct 31, 2022 Surface Water Treatment Rule
Oct 1, 2022 Oct 31, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Oct 31, 2022 Surface Water Treatment Rule
Oct 1, 2022 Dec 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 7, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Jul 31, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Jul 31, 2022 Surface Water Treatment Rule
Jul 1, 2022 Jul 31, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Jul 31, 2022 Surface Water Treatment Rule
Jul 1, 2022 Jul 31, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Jul 31, 2022 Surface Water Treatment Rule
Apr 1, 2022 Apr 30, 2022 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Apr 30, 2022 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2022 Mar 31, 2022 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2022 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Feb 1, 2022 Feb 28, 2022 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2022 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2022 Dec 31, 2022 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2022 Volatile Organic Chemicals
Jan 1, 2022 Dec 31, 2022 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2022 Volatile Organic Chemicals
Jan 1, 2022 Dec 31, 2022 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2022 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.

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