Drinking Water Compliance OS

COOKE CITY, MT · Park County

COOKE CITY WATER DISTRICT Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Montana’s official records. Always confirm current status with Montana before making decisions based on this information.

System facts

System ID (PWSID)
MT0000187
System type
Community Water System
Population served
300
Service connections
98
Ownership
local government
Water source
groundwater (wells)

Violation history

  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2025 – July 17, 2025

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2024 – July 24, 2024

    Resolved
  • Consumer Confidence Report Inadequate Reporting

    Consumer Confidence Rule

    October 1, 2023 – November 15, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    May 1, 2023 – May 31, 2023

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2022 – July 25, 2022

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    January 1, 2021 – March 31, 2021

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    October 1, 2020 – December 31, 2020

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    September 1, 2020 – September 30, 2020

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2020 – July 29, 2020

    Resolved
  • Monitoring, Regular

    OXAMYL

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Chlordane

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    HEXACHLOROBENZENE

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    2,4-D

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Heptachlor epoxide

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Heptachlor

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    LASSO

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Atrazine

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Carbofuran

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Hexachlorocyclopentadiene

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Dinoseb

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Picloram

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Simazine

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Dalapon

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Toxaphene

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Methoxychlor

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    BHC-GAMMA

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Endrin

    April 1, 2020 – June 30, 2020

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    Benzene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    Toluene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    Nitrate-Nitrite

    January 1, 2020 – December 31, 2020

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    January 1, 2020 – January 31, 2020

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    January 1, 2020 – December 26, 2022

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    May 1, 2019 – May 31, 2019

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    December 1, 2018 – December 31, 2018

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    September 1, 2018 – September 30, 2018

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    February 1, 2017 – February 28, 2017

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    October 1, 2016 – October 31, 2016

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2014 – September 11, 2014

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    June 1, 2014 – June 30, 2014

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    February 1, 2014 – February 28, 2014

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    January 1, 2014 – December 27, 2016

    Resolved
  • Lead Consumer Notice

    Lead and Copper Rule

    January 1, 2014 – February 14, 2014

    Resolved
  • Monitoring, Regular

    Nitrate-Nitrite

    January 1, 2014 – December 31, 2014

    Resolved
  • Monitoring, Regular

    Endrin

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    BHC-GAMMA

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Methoxychlor

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Toxaphene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Dalapon

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    OXAMYL

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Simazine

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Picloram

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Dinoseb

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Hexachlorocyclopentadiene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Carbofuran

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    LASSO

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Heptachlor epoxide

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    2,4-D

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    HEXACHLOROBENZENE

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Chlordane

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Benzene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Toluene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 2014 – December 27, 2016

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 2014 – December 27, 2016

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2013 – July 29, 2013

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2011 – August 12, 2011

    Resolved
  • Monitoring, Regular

    Nitrate-Nitrite

    January 1, 2011 – December 31, 2011

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Toluene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Benzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    October 1, 2009 – October 31, 2009

    Resolved
  • Follow-up Or Routine LCR Tap M/R

    Lead and Copper Rule

    October 1, 2009 – September 19, 2016

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2009 – August 31, 2009

    Resolved
  • Failure to Filter (SWTR)

    Health-based

    Surface Water Treatment Rule

    June 26, 2009 – November 2, 2009

    Resolved
  • Maximum Contaminant Level Violation, Acute (TCR)

    Health-based

    Coliform (TCR)

    June 1, 2009 – June 30, 2009

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    June 1, 2009 – January 22, 2010

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    May 1, 2009 – May 31, 2009

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2008 – July 31, 2008

    Resolved
  • Monitoring, Regular

    Fluoride

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    Toluene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    Benzene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Regular

    Fluoride

    January 1, 2006 – December 31, 2006

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    October 1, 2005 – October 31, 2005

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    September 1, 2005 – September 30, 2005

    Resolved
  • Monitoring, Regular

    Beryllium, Total

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Regular

    Nickel

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Regular

    Mercury

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Regular

    Chromium

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Regular

    Cadmium

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Regular

    Thallium, Total

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Regular

    Fluoride

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Regular

    Antimony, Total

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Regular

    Barium

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Regular

    Selenium

    January 1, 2005 – December 31, 2005

    Resolved
  • Follow-up Or Routine LCR Tap M/R

    Lead and Copper Rule

    October 1, 2004 – September 14, 2008

    Resolved
  • Failure to Filter (SWTR)

    Health-based

    Surface Water Treatment Rule

    January 31, 2004 – November 2, 2009

    Resolved
  • Failure to Filter (SWTR)

    Health-based

    Surface Water Treatment Rule

    February 1, 2002 – October 14, 2003

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    January 1, 2002 – January 31, 2002

    Resolved
  • Monitoring, Regular

    Antimony, Total

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Arsenic

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Nickel

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Thallium, Total

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 1998 – December 31, 1998

    Resolved
  • Monitoring, Regular

    Toxaphene

    January 1, 1996 – December 31, 1998

    Resolved
  • Monitoring, Regular

    Arsenic

    January 1, 1996 – December 31, 1998

    Resolved
  • Monitoring, Regular

    OXAMYL

    January 1, 1996 – December 31, 1998

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    January 1, 1996 – December 31, 1998

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    January 1, 1996 – December 31, 1998

    Resolved
  • Monitoring, Regular

    Dinoseb

    January 1, 1996 – December 31, 1998

    Resolved
  • Monitoring, Regular

    Heptachlor

    January 1, 1996 – December 31, 1998

    Resolved
  • Monitoring, Regular

    Total Polychlorinated Biphenyls (PCB)

    January 1, 1996 – December 31, 1998

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

Contact

ZAVORA, BEN

406-539-1478

COOKE CITY, MT 59020