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CHEFORNAK WATER SYSTEM

Alaska — Community Water System — PWSID: AK2270338

System Information

PWSIDAK2270338
System NameCHEFORNAK WATER SYSTEM
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedFeb 7, 1981
Last ReportedDec 19, 2025

Location & Contact

StateAlaska
CityCHEFORNAK
ZIP Code99561
AddressPO BOX 29
OrganizationMATHEW, LATESHA
Phone907-867-8147

Population & Service

Population Served513
Service Connections7

Drinking Water Violations (537)

This water system has 537 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
Apr 1, 2025 Apr 30, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2025 Revised Total Coliform 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 Mar 31, 2025 Toxaphene MR No Yes — 0.003 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 2,4-D MR No Yes — 0.07 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Endothall MR No Yes — 0.1 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Glyphosate MR No Yes — 0.7 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Dinoseb MR No Yes — 0.007 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Picloram MR No Yes — 0.5 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 ETHYLENE DIBROMIDE MR No Yes — 0.00005 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Endrin MR No Yes — 0.002 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Carbofuran MR No Yes — 0.04 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Simazine MR No Yes — 0.004 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Diquat MR No Yes — 0.02 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 OXAMYL MR No Yes — 0.2 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Chlordane MR No Yes — 0.002 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 LASSO MR No Yes — — — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 2,3,7,8-TCDD MR No Yes — 0.00000003 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Dalapon MR No Yes — 0.2 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Atrazine MR No Yes — 0.003 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Jan 1, 2025 Mar 31, 2025 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Mar 31, 2025 Synthetic Organic Chemicals
Dec 1, 2024 Dec 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2024 Revised Total Coliform Rule
Nov 1, 2024 Nov 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2024 Revised Total Coliform Rule
Oct 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 30, 2025 Consumer Confidence Rule
Sep 1, 2024 Sep 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2024 Revised Total Coliform Rule
Aug 1, 2024 Aug 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2024 Revised Total Coliform Rule
Jun 1, 2024 Jun 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2024 Revised Total Coliform Rule
Jun 1, 2024 — Groundwater Rule TT Yes No — — — Resolved Feb 25, 2025 Ground Water Rule
May 1, 2024 May 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2024 Revised Total Coliform Rule
Apr 1, 2024 Apr 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2024 Revised Total Coliform Rule
Feb 1, 2024 Feb 29, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Feb 29, 2024 Revised Total Coliform Rule
Jan 1, 2024 Dec 31, 2024 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2024 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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