LEWISTOWN, MT · Fergus County

LEWISTOWN CITY OF 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): MT0000271
System type: Community Water System
Population served: 5,923
Service connections: 2,906
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Source Water (GWR)
—
E. COLI
November 15, 2017 – January 2, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2017 – August 2, 2017
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
November 23, 2016 – November 28, 2016
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 2016 – March 31, 2016
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 2015 – December 31, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2015 – October 31, 2015
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2015 – September 30, 2015
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2015 – August 11, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2014 – November 30, 2014
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2014 – October 31, 2014
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2014 – September 30, 2014
Archived
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Endrin
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Simazine
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Picloram
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
LASSO
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Benzene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Toluene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Styrene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Barium
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Chromium
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Mercury
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Nickel
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Selenium
January 1, 2014 – December 31, 2016
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2012 – October 31, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2011 – October 31, 2011
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – December 30, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2011 – January 31, 2011
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2008 – August 13, 2008
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2007 – September 30, 2007
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
March 1, 2007 – March 31, 2007
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2006 – September 30, 2006
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2006 – July 31, 2006
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2006 – June 30, 2006
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2005 – September 30, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2005 – August 31, 2005
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Toluene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Styrene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Simazine
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Chromium
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 1999 – December 31, 2001
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 1998 – November 30, 1998
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 1997 – July 31, 1997
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 1997 – February 28, 1997
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 1996 – February 29, 1996
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1995 – September 30, 1995
Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
November 15, 2017 – January 2, 2018	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
July 1, 2017 – August 2, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
November 23, 2016 – November 28, 2016	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
March 1, 2016 – March 31, 2016	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
December 1, 2015 – December 31, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2015 – October 31, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
September 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 2015 – August 11, 2015	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
November 1, 2014 – November 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 2014 – October 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
September 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
January 1, 2014 – December 31, 2016	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Endrin	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Simazine	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Picloram	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	LASSO	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Benzene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Toluene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Styrene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Barium	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Chromium	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Mercury	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Nickel	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Selenium	—	Resolved
October 1, 2012 – October 31, 2012	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2011 – October 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2011 – December 30, 2013	Monitoring, Regular	Asbestos	—	Resolved
January 1, 2011 – January 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2008 – August 13, 2008	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
September 1, 2007 – September 30, 2007	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
March 1, 2007 – March 31, 2007	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2006 – September 30, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2006 – July 31, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 1, 2006 – June 30, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2005 – September 30, 2005	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2005 – August 31, 2005	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Toluene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Styrene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Simazine	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Chromium	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Antimony, Total	—	Resolved
November 1, 1998 – November 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1997 – July 31, 1997	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
February 1, 1997 – February 28, 1997	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
February 1, 1996 – February 29, 1996	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 1995 – September 30, 1995	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

July 17, 2025State Violation/Reminder Notice1 linked violation
July 17, 2025State Compliance achieved1 linked violation
January 2, 2018State Compliance achieved2 linked violations
December 15, 2017State Public Notification requested3 linked violations
August 2, 2017State Compliance achieved2 linked violations
July 20, 2017State Violation/Reminder Notice1 linked violation
March 14, 2017State Compliance achieved22 linked violations
March 14, 2017State Compliance achieved10 linked violations
March 14, 2017State Compliance achieved24 linked violations
February 14, 2017State Public Notification requested22 linked violations
February 14, 2017State Public Notification requested23 linked violations
February 14, 2017State Violation/Reminder Notice23 linked violations
February 14, 2017State Violation/Reminder Notice22 linked violations
February 3, 2017State Public Notification requested2 linked violations
February 3, 2017State Public Notification requested10 linked violations
February 3, 2017State Violation/Reminder Notice10 linked violations
December 15, 2016State Public Notification requested2 linked violations
December 15, 2016State Violation/Reminder Notice1 linked violation
November 28, 2016State Compliance achieved2 linked violations
April 25, 2016State Compliance achieved1 linked violation
March 25, 2016State Public Notification requested1 linked violation
March 25, 2016State Violation/Reminder Notice1 linked violation
March 25, 2016State Violation/Reminder Notice1 linked violation
February 16, 2016State Compliance achieved1 linked violation
January 14, 2016State Other1 linked violation
January 14, 2016State Other6 linked violations
December 21, 2015State Violation/Reminder Notice1 linked violation
December 21, 2015State Public Notification requested1 linked violation
December 21, 2015State Violation/Reminder Notice1 linked violation
November 17, 2015State Compliance achieved1 linked violation
November 2, 2015State Compliance achieved1 linked violation
October 16, 2015State Public Notification requested1 linked violation
October 16, 2015State Violation/Reminder Notice1 linked violation
October 16, 2015State Violation/Reminder Notice1 linked violation
September 21, 2015State Violation/Reminder Notice1 linked violation
September 21, 2015State Public Notification requested1 linked violation
September 21, 2015State Violation/Reminder Notice1 linked violation
August 11, 2015State Compliance achieved1 linked violation
July 15, 2015State Violation/Reminder Notice1 linked violation
December 16, 2014State Compliance achieved1 linked violation
December 16, 2014State Compliance achieved1 linked violation
December 16, 2014State Compliance achieved1 linked violation
November 21, 2014State Violation/Reminder Notice1 linked violation
November 21, 2014State Violation/Reminder Notice1 linked violation
November 21, 2014State Public Notification requested1 linked violation
October 29, 2014State Violation/Reminder Notice1 linked violation
October 29, 2014State Public Notification requested1 linked violation
October 29, 2014State Violation/Reminder Notice1 linked violation
September 9, 2014State Violation/Reminder Notice1 linked violation
September 9, 2014State Public Notification requested1 linked violation
September 9, 2014State Violation/Reminder Notice1 linked violation
January 24, 2014State Public Notification requested1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
December 30, 2013State Compliance achieved1 linked violation
November 14, 2012State Compliance achieved1 linked violation
October 20, 2012State Public Notification received1 linked violation
October 15, 2012State Violation/Reminder Notice1 linked violation
October 15, 2012State Public Notification requested1 linked violation
October 15, 2012State Violation/Reminder Notice1 linked violation
November 1, 2011State Compliance achieved1 linked violation
October 12, 2011State Public Notification requested1 linked violation
October 12, 2011State Violation/Reminder Notice1 linked violation
October 12, 2011State Violation/Reminder Notice1 linked violation
February 1, 2011State Compliance achieved1 linked violation
January 11, 2011State Public Notification requested1 linked violation
January 11, 2011State Violation/Reminder Notice1 linked violation
January 11, 2011State Violation/Reminder Notice1 linked violation
October 5, 2010State Compliance achieved1 linked violation
September 28, 2010State Public Notification received1 linked violation
September 13, 2010State Violation/Reminder Notice1 linked violation
September 13, 2010State Public Notification requested1 linked violation
September 13, 2010State Violation/Reminder Notice1 linked violation
April 17, 2009State Compliance achieved66 linked violations
December 4, 2008State Compliance achieved21 linked violations
August 13, 2008State Violation/Reminder Notice1 linked violation
August 13, 2008State Compliance achieved1 linked violation
August 13, 2008State Public Notification requested1 linked violation
April 1, 2008State Compliance achieved7 linked violations
February 14, 2008State Public Notification received1 linked violation
September 10, 2007State Violation/Reminder Notice1 linked violation
September 10, 2007State Public Notification requested1 linked violation
September 10, 2007State Violation/Reminder Notice1 linked violation
April 17, 2007State Public Notification requested2 linked violations
January 29, 2007State Public Notification requested1 linked violation
October 20, 2006State Public Notification requested2 linked violations
September 21, 2006State Violation/Reminder Notice22 linked violations
September 21, 2006State Public Notification requested3 linked violations
September 21, 2006State Violation/Reminder Notice2 linked violations
August 21, 2006State Violation/Reminder Notice6 linked violations
August 21, 2006State Violation/Reminder Notice3 linked violations
June 30, 2006State Violation/Reminder Notice1 linked violation
February 7, 2006State Compliance achieved2 linked violations
January 4, 2006State Compliance achieved1 linked violation
October 21, 2005State Violation/Reminder Notice1 linked violation
October 21, 2005State Violation/Reminder Notice1 linked violation
October 21, 2005State Public Notification requested1 linked violation
August 11, 2005State Public Notification requested1 linked violation
August 11, 2005State Violation/Reminder Notice1 linked violation
August 11, 2005State Violation/Reminder Notice1 linked violation
May 11, 2005State Compliance achieved1 linked violation
April 15, 2005State Public Notification requested21 linked violations
April 15, 2005State Violation/Reminder Notice21 linked violations
April 14, 2005State Public Notification requested26 linked violations
April 14, 2005State Violation/Reminder Notice26 linked violations
April 13, 2005State Public Notification requested1 linked violation
April 13, 2005State Violation/Reminder Notice1 linked violation
October 15, 2004State Violation/Reminder Notice1 linked violation
October 15, 2004State Public Notification requested1 linked violation
October 15, 2004State Violation/Reminder Notice1 linked violation
December 6, 2002State Public Notification received1 linked violation
December 6, 2002State Compliance achieved1 linked violation
October 18, 2002State Public Notification requested1 linked violation
October 18, 2002State Violation/Reminder Notice1 linked violation
October 18, 2002State Violation/Reminder Notice1 linked violation
July 25, 2002State Violation/Reminder Notice1 linked violation
July 25, 2002State Public Notification requested1 linked violation
December 13, 2001State Compliance achieved1 linked violation
October 31, 2001State Public Notification requested1 linked violation
October 31, 2001State Violation/Reminder Notice1 linked violation
October 31, 2001State Violation/Reminder Notice1 linked violation
August 22, 2001State Compliance achieved1 linked violation

Contact

PHELPS, HOLLY.

406-535-1770

LEWISTOWN, MT 59457