LEWISTOWN, MT · Fergus County

KING RANCH COLONY Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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): MT0000432
System type: Community Water System
Population served: 56
Service connections: 17
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2025 – March 31, 2025
Archived
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2024
Unaddressed
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2024 – June 30, 2024
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2024 – March 31, 2024
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2023 – December 31, 2023
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2023 – June 30, 2023
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2023 – March 31, 2023
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2022 – December 31, 2022
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2022 – October 26, 2022
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2022 – June 30, 2022
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2022 – March 31, 2022
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2021 – December 31, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2021 – September 30, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2021 – June 30, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2020 – December 31, 2020
Archived
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2020 – October 27, 2022
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – October 26, 2022
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2020 – March 31, 2020
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2019 – August 27, 2021
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2019 – December 31, 2019
Archived
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2019 – October 25, 2019
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2019 – October 25, 2019
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2018 – July 31, 2018
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
October 1, 2017 – December 31, 2017
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Benzene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Toluene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Styrene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Endrin
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Simazine
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Picloram
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
LASSO
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Nickel
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2017 – December 31, 2019
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2015 – September 20, 2016
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2015 – September 30, 2015
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2015 – March 31, 2015
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2014 – December 31, 2014
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2014 – September 30, 2014
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2014 – June 30, 2014
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2014 – March 31, 2014
Archived
Monitoring, Regular
—
Nitrate-Nitrite
October 1, 2013 – December 31, 2013
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2013 – September 30, 2013
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2013 – June 30, 2013
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2013 – June 30, 2013
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2013 – March 31, 2013
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2012 – December 31, 2012
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – July 23, 2012
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2012 – September 30, 2012
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2012 – June 30, 2012
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2011 – December 31, 2011
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2011 – September 30, 2011
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2011 – June 30, 2011
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2011 – March 31, 2011
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2010 – December 31, 2010
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2010 – September 30, 2010
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2010 – June 30, 2010
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2010 – March 31, 2010
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2009 – December 31, 2009
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2009 – September 30, 2009
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2009 – June 30, 2009
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2009 – March 31, 2009
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2008 – December 31, 2008
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2008 – September 30, 2008
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2008 – June 30, 2008
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2008 – March 31, 2008
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2007 – December 31, 2007
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2007 – September 30, 2007
Archived
Monitoring, Regular
—
Nitrate-Nitrite
April 1, 2007 – June 30, 2007
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2007 – June 30, 2007
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2007 – March 31, 2007
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2006 – December 31, 2006
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2006 – September 30, 2006
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2006 – March 31, 2006
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2005 – December 31, 2005
Archived
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1996 – March 31, 1996
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 1996 – February 29, 1996
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
October 1, 1980 – October 31, 1980
Archived

Archived closed in EPA's records (typically due to age or a data correction)Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2025 – March 31, 2025	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
December 30, 2024	Lead Consumer Notice	Lead and Copper Rule	—	Unaddressed
June 1, 2024 – June 30, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2024 – March 31, 2024	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2023 – December 31, 2023	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
April 1, 2023 – June 30, 2023	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2023 – March 31, 2023	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2022 – December 31, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
July 1, 2022 – October 26, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2022 – June 30, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2022 – March 31, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2021 – December 31, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
July 1, 2021 – September 30, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
April 1, 2021 – June 30, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2020 – December 31, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2020 – October 27, 2022	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2020 – October 26, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2020 – March 31, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2019 – August 27, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2019 – December 31, 2019	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2019 – October 25, 2019	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2019 – October 25, 2019	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2018 – July 31, 2018	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
October 1, 2017 – December 31, 2017	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Benzene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Toluene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Styrene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Endrin	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Simazine	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Picloram	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	LASSO	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Nickel	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
October 1, 2015 – September 20, 2016	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
January 1, 2015 – March 31, 2015	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
October 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
April 1, 2014 – June 30, 2014	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2014 – March 31, 2014	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2013 – December 31, 2013	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
July 1, 2013 – September 30, 2013	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
June 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2013 – March 31, 2013	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2012 – December 31, 2012	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
July 1, 2012 – July 23, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2012 – September 30, 2012	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
April 1, 2012 – June 30, 2012	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2011 – December 31, 2011	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
July 1, 2011 – September 30, 2011	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
April 1, 2011 – June 30, 2011	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2011 – March 31, 2011	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2010 – December 31, 2010	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
July 1, 2010 – September 30, 2010	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
April 1, 2010 – June 30, 2010	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2010 – March 31, 2010	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2009 – December 31, 2009	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
July 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
July 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
April 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2008 – March 31, 2008	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2007 – December 31, 2007	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
July 1, 2007 – September 30, 2007	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
April 1, 2007 – June 30, 2007	Monitoring, Regular	Nitrate-Nitrite	—	Archived
April 1, 2007 – June 30, 2007	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2007 – March 31, 2007	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
October 1, 2006 – December 31, 2006	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
July 1, 2006 – September 30, 2006	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2006 – March 31, 2006	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2005 – December 31, 2005	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Archived
January 1, 2001 – December 31, 2001	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
March 1, 1996 – March 31, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 1996 – February 29, 1996	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 1980 – October 31, 1980	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Archived

Archived closed in EPA's records (typically due to age or a data correction)Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

December 24, 2025State Violation/Reminder Notice1 linked violation
December 24, 2025State Public Notification requested1 linked violation
October 14, 2025State Violation/Reminder Notice1 linked violation
October 14, 2025State Public Notification requested1 linked violation
July 1, 2025State Violation/Reminder Notice1 linked violation
July 1, 2025State Public Notification requested1 linked violation
February 26, 2025State Violation/Reminder Notice1 linked violation
February 26, 2025State Public Notification requested1 linked violation
February 4, 2025State Violation/Reminder Notice1 linked violation
January 27, 2025State Violation/Reminder Notice1 linked violation
January 27, 2025State Public Notification requested1 linked violation
October 29, 2024State Public Notification received1 linked violation
October 15, 2024State Violation/Reminder Notice1 linked violation
October 15, 2024State Public Notification requested1 linked violation
July 25, 2024State Compliance achieved1 linked violation
July 17, 2024State Public Notification requested1 linked violation
July 17, 2024State Violation/Reminder Notice1 linked violation
July 10, 2024State Violation/Reminder Notice2 linked violations
July 10, 2024State Public Notification requested1 linked violation
February 23, 2024State Public Notification requested1 linked violation
February 23, 2024State Violation/Reminder Notice1 linked violation
February 21, 2024State Compliance achieved1 linked violation
January 24, 2024State Violation/Reminder Notice1 linked violation
January 24, 2024State Public Notification requested1 linked violation
October 25, 2023State Public Notification received1 linked violation
October 11, 2023State Public Notification requested3 linked violations
July 5, 2023State Public Notification requested1 linked violation
July 5, 2023State Violation/Reminder Notice1 linked violation
May 12, 2023State Public Notification received1 linked violation
April 6, 2023State Violation/Reminder Notice1 linked violation
April 6, 2023State Public Notification requested1 linked violation
January 5, 2023State Public Notification received1 linked violation
December 7, 2022State Public Notification requested1 linked violation
November 16, 2022State Compliance achieved22 linked violations
November 16, 2022State Compliance achieved24 linked violations
November 16, 2022State Compliance achieved4 linked violations
October 27, 2022State Compliance achieved4 linked violations
October 26, 2022State Compliance achieved2 linked violations
October 26, 2022State Compliance achieved2 linked violations
October 12, 2022State Public Notification requested3 linked violations
July 11, 2022State Violation/Reminder Notice1 linked violation
June 9, 2022State Violation/Reminder Notice91 linked violations
June 2, 2022State Violation/Reminder Notice1 linked violation
June 2, 2022State Public Notification requested2 linked violations
April 7, 2022State Violation/Reminder Notice4 linked violations
January 7, 2022State Violation/Reminder Notice17 linked violations
September 9, 2021State Violation/Reminder Notice1 linked violation
September 9, 2021State Public Notification requested1 linked violation
August 27, 2021State Compliance achieved1 linked violation
July 26, 2021State Public Notification received1 linked violation
July 13, 2021State Public Notification requested1 linked violation
July 13, 2021State Violation/Reminder Notice1 linked violation
December 30, 2020State Violation/Reminder Notice1 linked violation
October 27, 2020State Violation/Reminder Notice1 linked violation
July 20, 2020State Violation/Reminder Notice1 linked violation
April 14, 2020State Public Notification requested2 linked violations
January 22, 2020State Violation/Reminder Notice22 linked violations
January 22, 2020State Violation/Reminder Notice24 linked violations
January 22, 2020State Public Notification requested23 linked violations
January 22, 2020State Public Notification requested22 linked violations
January 22, 2020State Violation/Reminder Notice4 linked violations
January 22, 2020State Public Notification requested4 linked violations
December 19, 2019State Public Notification received1 linked violation
December 4, 2019State Violation/Reminder Notice1 linked violation
October 25, 2019State Compliance achieved1 linked violation
October 25, 2019State Compliance achieved2 linked violations
October 23, 2019State Violation/Reminder Notice1 linked violation
October 23, 2019State Public Notification requested1 linked violation
October 17, 2019State Violation/Reminder Notice1 linked violation
July 17, 2019State Violation/Reminder Notice1 linked violation
July 31, 2018State Compliance achieved4 linked violations
July 19, 2018State Compliance achieved23 linked violations
February 6, 2018State Public Notification received2 linked violations
January 23, 2018State Violation/Reminder Notice3 linked violations
March 28, 2016State Compliance achieved1 linked violation
March 28, 2016State Compliance achieved3 linked violations
October 19, 2015State Public Notification requested5 linked violations
October 16, 2015State Public Notification received6 linked violations
October 5, 2015State Public Notification requested3 linked violations
April 15, 2015State Violation/Reminder Notice1 linked violation
April 14, 2015State Compliance achieved4 linked violations
January 16, 2015State Public Notification received2 linked violations
January 5, 2015State Public Notification requested1 linked violation
October 30, 2014State Public Notification received1 linked violation
October 9, 2014State Violation/Reminder Notice1 linked violation
October 9, 2014State Public Notification requested1 linked violation
July 17, 2014State Public Notification received1 linked violation
February 12, 2014State Public Notification received1 linked violation
February 7, 2014State Violation/Reminder Notice1 linked violation
February 7, 2014State Public Notification requested1 linked violation
February 4, 2014State Compliance achieved1 linked violation
January 15, 2014State Violation/Reminder Notice1 linked violation
January 15, 2014State Public Notification requested1 linked violation
October 15, 2013State Public Notification received1 linked violation
October 2, 2013State Violation/Reminder Notice1 linked violation
October 2, 2013State Public Notification requested1 linked violation
July 26, 2013State Compliance achieved1 linked violation
June 26, 2013State Public Notification received1 linked violation
June 26, 2013State Public Notification received1 linked violation
June 19, 2013State Violation/Reminder Notice1 linked violation
June 19, 2013State Violation/Reminder Notice1 linked violation
June 19, 2013State Public Notification requested1 linked violation
June 7, 2013State Violation/Reminder Notice1 linked violation
June 7, 2013State Public Notification requested1 linked violation
April 25, 2013State Public Notification received2 linked violations
March 15, 2013State Public Notification received1 linked violation
March 5, 2013State Public Notification requested1 linked violation
March 5, 2013State Violation/Reminder Notice1 linked violation
January 7, 2013State Public Notification received1 linked violation
January 2, 2013State Public Notification requested1 linked violation
January 2, 2013State Violation/Reminder Notice1 linked violation
December 19, 2012State Public Notification requested1 linked violation
December 19, 2012State Violation/Reminder Notice1 linked violation
December 19, 2012State Public Notification requested1 linked violation
December 19, 2012State Violation/Reminder Notice1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement14 linked violations
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement18 linked violations
November 19, 2012State Consent Decree/Judgement3 linked violations
November 19, 2012State Administrative/Compliance Order with penalty issued20 linked violations
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement5 linked violations
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement3 linked violations
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
November 19, 2012State Consent Decree/Judgement1 linked violation
July 23, 2012State Compliance achieved1 linked violation
July 12, 2012State Public Notification requested1 linked violation
July 12, 2012State Violation/Reminder Notice1 linked violation
December 29, 2011State Public Notification received1 linked violation
December 9, 2011State Violation/Reminder Notice1 linked violation
December 9, 2011State Public Notification requested1 linked violation
November 9, 2011State Public Notification received1 linked violation
October 6, 2011State Public Notification requested1 linked violation
October 6, 2011State Violation/Reminder Notice1 linked violation
September 2, 2011State Public Notification received1 linked violation
August 17, 2011State Public Notification requested1 linked violation
August 17, 2011State Violation/Reminder Notice1 linked violation
April 28, 2011State Public Notification received1 linked violation
April 11, 2011State Violation/Reminder Notice1 linked violation
April 11, 2011State Public Notification requested1 linked violation
January 13, 2011State Public Notification received1 linked violation
December 29, 2010State Violation/Reminder Notice1 linked violation
December 29, 2010State Public Notification requested1 linked violation
November 15, 2010State Public Notification received1 linked violation
November 1, 2010State Violation/Reminder Notice1 linked violation
November 1, 2010State Public Notification requested1 linked violation
November 1, 2010State Violation/Reminder Notice1 linked violation
July 15, 2010State Violation/Reminder Notice1 linked violation
July 15, 2010State Public Notification requested1 linked violation
April 30, 2010State Public Notification received1 linked violation
April 19, 2010State Public Notification requested1 linked violation
April 19, 2010State Violation/Reminder Notice1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court9 linked violations
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court2 linked violations
February 22, 2010State Civil Case filed in State court2 linked violations
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court30 linked violations
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court3 linked violations
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court2 linked violations
February 22, 2010State Civil Case filed in State court2 linked violations
February 22, 2010State Civil Case filed in State court1 linked violation
February 22, 2010State Civil Case filed in State court1 linked violation
February 19, 2010State Civil Case filed in State court24 linked violations
February 19, 2010State Civil Case filed in State court1 linked violation
February 19, 2010State Civil Case filed in State court5 linked violations
December 31, 2009State Public Notification received1 linked violation
December 16, 2009State Public Notification requested2 linked violations
October 30, 2009State Public Notification received1 linked violation
October 15, 2009State Public Notification requested1 linked violation
October 15, 2009State Violation/Reminder Notice1 linked violation
July 17, 2009State Public Notification received1 linked violation
July 8, 2009State Public Notification requested1 linked violation
July 8, 2009State Violation/Reminder Notice1 linked violation
April 7, 2009State Public Notification received1 linked violation
March 31, 2009State Public Notification requested1 linked violation
March 31, 2009State Violation/Reminder Notice1 linked violation
January 15, 2009State Public Notification requested1 linked violation
January 15, 2009State Violation/Reminder Notice1 linked violation
January 7, 2009State Compliance achieved5 linked violations
October 15, 2008State Public Notification requested1 linked violation
July 10, 2008State Public Notification received2 linked violations
April 21, 2008State Public Notification received1 linked violation
April 14, 2008State Violation/Reminder Notice1 linked violation
January 4, 2008State Public Notification received1 linked violation
December 18, 2007State Public Notification requested2 linked violations
December 18, 2007State Violation/Reminder Notice1 linked violation
November 30, 2007State Public Notification received1 linked violation
October 11, 2007State Violation/Reminder Notice1 linked violation
July 24, 2007State Public Notification received6 linked violations
July 24, 2007State Public Notification requested1 linked violation
July 19, 2007State Compliance achieved1 linked violation
July 13, 2007State Public Notification requested1 linked violation
July 13, 2007State Violation/Reminder Notice1 linked violation
April 25, 2007State Public Notification requested2 linked violations
April 25, 2007State Violation/Reminder Notice1 linked violation
April 12, 2007State Public Notification received1 linked violation
January 17, 2007State Public Notification received1 linked violation
January 17, 2007State Public Notification requested1 linked violation
October 16, 2006State Public Notification requested1 linked violation
October 16, 2006State Violation/Reminder Notice1 linked violation
October 10, 2006State Public Notification received1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued2 linked violations
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued4 linked violations
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued5 linked violations
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
September 21, 2006State Administrative/Compliance Order with penalty issued1 linked violation
June 1, 2006State Public Notification requested1 linked violation
May 17, 2006State Public Notification received2 linked violations
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other2 linked violations
March 30, 2006State Other1 linked violation
March 30, 2006State Other12 linked violations
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other3 linked violations
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
March 30, 2006State Other1 linked violation
February 16, 2006State Public Notification received1 linked violation
February 15, 2006State Violation/Reminder Notice1 linked violation
February 15, 2006State Public Notification requested2 linked violations
January 18, 2006State Public Notification requested1 linked violation
January 18, 2006State Violation/Reminder Notice1 linked violation
December 3, 2002State Compliance achieved2 linked violations
January 2, 1992State Violation/Reminder Notice5 linked violations

Contact

HOFER, MARVIN M

406-538-9835

LEWISTOWN, MT 59457