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CHEHALIS TRIBAL HOUSING

Washington — Community Water System — PWSID: 105300027

System Information

PWSID105300027
System NameCHEHALIS TRIBAL HOUSING
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region10
Serves SchoolNo
WholesalerYes
First ReportedJan 27, 1981
Last ReportedDec 30, 2025

Location & Contact

StateWashington
CityOAKVILLE
ZIP Code98568
AddressP.O. BOX 536
OrganizationHAYDEN, TOM
Phone360-709-1856

Population & Service

Population Served620
Service Connections114

Drinking Water Violations (120)

This water system has 120 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
Jun 1, 2025 — Revised Total Coliform Rule RPT No No — — — Resolved Jul 14, 2025 Revised Total Coliform Rule
Apr 3, 2025 — Public Notice Other No No — — — Resolved Jun 27, 2025 Public Notice Rule and Revised PN Rule
Apr 1, 2025 — Revised Total Coliform Rule RPT No No — — — Resolved May 23, 2025 Revised Total Coliform Rule
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Jun 30, 2025 Lead and Copper Rule Revisions
Mar 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Oct 14, 2024 Revised Total Coliform Rule
Jan 1, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2021 Dec 31, 2021 Nitrate MR No Yes — 10 mg/L — Resolved Dec 10, 2021 Nitrate Rule
Oct 31, 2020 — Lead and Copper Rule MR No No — TT — Resolved Feb 22, 2021 Lead and Copper Rule
Jul 1, 2017 — Consumer Confidence Rule Other No No — — — Resolved Dec 1, 2017 Consumer Confidence Rule
Jan 1, 2017 Dec 31, 2022 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2017 Dec 31, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2017 Dec 31, 2022 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2016 Jun 30, 2016 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 — Consumer Confidence Rule Other No No — — — Resolved Jul 5, 2016 Consumer Confidence Rule
Jul 1, 2015 — Consumer Confidence Rule Other No No — — — Resolved Jul 7, 2015 Consumer Confidence Rule
Jan 1, 2015 Aug 31, 2017 TTHM MR No Yes — 0.080 mg/L — Resolved Aug 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2013 Nov 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2013 Total Coliform Rule
Oct 1, 2013 Dec 31, 2013 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2012 Dec 31, 2012 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2012 Mar 31, 2012 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2011 — Consumer Confidence Rule Other No No — — — Resolved Oct 4, 2011 Consumer Confidence Rule
Jul 1, 2011 Sep 30, 2011 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2011 Jun 30, 2011 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2011 Jun 30, 2011 Combined Uranium MR No Yes — 30 ug/L — Resolved Jun 30, 2011 Radionuclides and Revised Rad Rule
Apr 1, 2011 Jun 30, 2011 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2011 Radionuclides and Revised Rad Rule
Jan 1, 2011 Mar 31, 2011 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2011 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2013 Volatile Organic Chemicals
Jan 1, 2011 Mar 31, 2011 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2011 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2013 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2013 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2013 LASSO MR No Yes — — — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Dec 31, 2013 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2013 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2013 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2013 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2013 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Simazine MR No Yes — 0.004 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2013 Volatile Organic Chemicals
Oct 1, 2010 Dec 31, 2010 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2010 Nitrate Rule
Oct 1, 2010 Dec 31, 2010 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Oct 1, 2010 Dec 31, 2010 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Aug 1, 2010 Aug 31, 2010 Coliform (TCR) MR No No — 5% of samples — Resolved Aug 31, 2010 Total Coliform Rule
Jul 1, 2010 Sep 30, 2010 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2010 Radionuclides and Revised Rad Rule
Apr 1, 2010 Jun 30, 2010 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2010 Radionuclides and Revised Rad Rule

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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