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DAYTON, TOWN OF

Wyoming — Community Water System — PWSID: WY5600202

System Information

PWSIDWY5600202
System NameDAYTON, TOWN OF
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedNov 17, 2025

Location & Contact

StateWyoming
CityDAYTON
ZIP Code82836
AddressP.O. Box 100 (119 3rd Ave)
OrganizationKEPLEY, TRACY
Phone307-751-5640

Population & Service

Population Served824
Service Connections413

Drinking Water Violations (64)

This water system has 64 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, 2023 Jul 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Archived Jul 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2023 Jul 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Archived Jul 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2023 Jul 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Archived Jul 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2023 May 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Archived May 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2023 May 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Archived May 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2023 May 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Archived May 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2023 Apr 30, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Archived Apr 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2023 Apr 30, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Archived Apr 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2023 Apr 30, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Archived Apr 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2014 Mar 31, 2014 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Mar 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Mar 31, 2014 TTHM MR No No — 0.080 mg/L — Resolved Mar 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2012 Jun 30, 2012 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2012 Jun 30, 2012 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2012 Jun 30, 2012 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2012 Jun 30, 2012 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 TTHM MR No No — 0.080 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 TTHM MR No No — 0.080 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 TTHM MR No No — 0.080 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2009 Jun 30, 2009 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2009 Jun 30, 2009 TTHM MR No No — 0.080 mg/L — Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Feb 1, 2009 Feb 28, 2009 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 2009 Total Coliform Rule
Jul 1, 2006 Sep 30, 2006 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2006 Sep 30, 2006 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2006 Sep 30, 2006 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2006 Sep 30, 2006 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2006 Sep 30, 2006 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2006 Sep 30, 2006 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2006 Jul 31, 2006 Coliform (TCR) MR No No — 5% of samples — Archived Jul 31, 2006 Total Coliform Rule
Jul 1, 2005 Sep 30, 2005 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 TTHM MR No No — 0.080 mg/L — Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 TTHM MR No No — 0.080 mg/L — Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 TTHM MR No No — 0.080 mg/L — Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2005 Dec 31, 2005 CYANIDE MR No Yes — 0.2 mg/L — Resolved Dec 31, 2005 Inorganic Chemicals
Jan 1, 2005 Dec 31, 2005 CYANIDE MR No Yes — 0.2 mg/L — Resolved Dec 31, 2005 Inorganic Chemicals
Jan 1, 2004 Mar 31, 2004 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2004 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 1999 Dec 31, 1999 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 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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