BASIN, MT · Jefferson County

BASIN COUNTY WATER AND SEWER DIST 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): MT0000014
System type: Community Water System
Population served: 200
Service connections: 105
Ownership: public/private mix
Water source: groundwater (wells)

Violation history

Lead Consumer Notice
—
Lead and Copper Rule
October 1, 2023 – February 13, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – July 5, 2023
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2023 – March 17, 2025
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2022 – August 16, 2022
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2014
Addressed
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2011 – April 30, 2011
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2011 – June 30, 2011
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2010 – October 31, 2010
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
September 30, 2010 – February 14, 2011
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2010 – June 25, 2010
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Picloram
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Simazine
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Benzene
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
LASSO
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2008 – December 20, 2010
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2008 – January 31, 2008
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2007 – June 30, 2007
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2006 – December 31, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2006 – June 30, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2006 – April 30, 2006
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2006 – June 30, 2006
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2005 – September 19, 2005
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2005 – June 30, 2005
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 2004 – May 31, 2006
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2003 – May 31, 2003
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 2003 – February 21, 2006
Resolved
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
January 1, 2003 – February 28, 2008
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2003 – June 30, 2003
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 2002 – February 21, 2006
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2002 – December 31, 2004
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 2002 – February 21, 2006
Resolved
Monitoring, Regular
—
Barium
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Nickel
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Selenium
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Chromium
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Mercury
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2002 – December 31, 2004
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2001 – December 31, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2001 – December 31, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2001 – December 31, 2001
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2001 – May 31, 2001
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 2001 – August 13, 2001
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 2000 – February 21, 2006
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2000 – December 31, 2000
Archived
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2000 – December 31, 2000
Archived
Monitoring, Regular
—
Antimony, Total
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Mercury
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Fluoride
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Cadmium
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Barium
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Chlordane
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Pentachlorophenol
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
2,4-D
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Heptachlor epoxide
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Aldicarb
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Aldicarb sulfone
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Dinoseb
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Picloram
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Simazine
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
OXAMYL
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Glyphosate
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Endothall
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Diquat
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Dalapon
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Toxaphene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Methoxychlor
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
BHC-GAMMA
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Endrin
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Styrene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Toluene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Benzene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Arsenic
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Xylenes, Total
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 1999 – December 31, 2001
Archived
Monitoring, Regular
—
Selenium
January 1, 1999 – December 31, 2001
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 1997 – May 31, 1997
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1993 – November 25, 1996
Resolved

Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmationArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2023 – February 13, 2024	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2023 – July 5, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2023 – March 17, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2022 – August 16, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
December 30, 2014	Lead Consumer Notice	Lead and Copper Rule	—	Addressed
April 1, 2011 – April 30, 2011	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2011 – June 30, 2011	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
October 1, 2010 – October 31, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 30, 2010 – February 14, 2011	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2010 – June 25, 2010	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Picloram	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Simazine	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Benzene	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	LASSO	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 2008 – December 20, 2010	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2008 – January 31, 2008	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2007 – June 30, 2007	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2006 – December 31, 2006	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
June 1, 2006 – June 30, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2006 – April 30, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2006 – June 30, 2006	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2005 – September 19, 2005	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2005 – June 30, 2005	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2004 – May 31, 2006	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
May 1, 2003 – May 31, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2003 – February 21, 2006	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 2003 – February 28, 2008	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
January 1, 2003 – June 30, 2003	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2002 – February 21, 2006	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2002 – February 21, 2006	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Barium	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Nickel	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Selenium	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Chromium	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Mercury	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Cadmium	—	Resolved
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
May 1, 2001 – May 31, 2001	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2001 – August 13, 2001	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
July 1, 2000 – February 21, 2006	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	Nitrate-Nitrite	—	Archived
January 1, 2000 – December 31, 2000	Monitoring, Regular	Nitrate-Nitrite	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Mercury	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Fluoride	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Cadmium	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Barium	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Chlordane	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Pentachlorophenol	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	2,4-D	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Heptachlor epoxide	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Aldicarb	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Aldicarb sulfone	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Aldicarb sulfoxide	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Dinoseb	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Picloram	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Simazine	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	OXAMYL	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Glyphosate	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Endothall	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Diquat	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Dalapon	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Toxaphene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Methoxychlor	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	BHC-GAMMA	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Endrin	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Styrene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Toluene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Benzene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Arsenic	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	p-Dichlorobenzene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Xylenes, Total	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Selenium	—	Resolved
May 1, 1997 – May 31, 1997	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1993 – November 25, 1996	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved

Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmationArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

March 17, 2025State Compliance achieved1 linked violation
February 26, 2024State Compliance achieved1 linked violation
February 26, 2024State Compliance achieved1 linked violation
February 13, 2024State Compliance achieved1 linked violation
November 20, 2023State Violation/Reminder Notice1 linked violation
November 13, 2023State Compliance achieved1 linked violation
July 27, 2023State Violation/Reminder Notice1 linked violation
July 27, 2023State Public Notification requested1 linked violation
July 11, 2023State Violation/Reminder Notice1 linked violation
July 5, 2023State Compliance achieved1 linked violation
October 17, 2022State Violation/Reminder Notice1 linked violation
August 25, 2022State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 16, 2022State Compliance achieved1 linked violation
July 28, 2022State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
July 28, 2022State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
July 11, 2022State Violation/Reminder Notice1 linked violation
April 4, 2022State Violation/Reminder Notice1 linked violation
March 11, 2022State Public Notification received1 linked violation
February 28, 2022State Compliance achieved1 linked violation
February 2, 2022State Public Notification requested1 linked violation
February 2, 2022State Violation/Reminder Notice1 linked violation
September 14, 2021State Compliance achieved2 linked violations
February 10, 2021State Public Notification requested1 linked violation
February 10, 2021State Violation/Reminder Notice1 linked violation
October 19, 2020State Public Notification requested3 linked violations
March 2, 2016State Administrative/Compliance Order with penalty issued2 linked violations
March 2, 2016State Administrative/Compliance Order with penalty issued1 linked violation
February 26, 2016State Compliance achieved1 linked violation
October 22, 2015State Violation/Reminder Notice1 linked violation
October 22, 2015State Compliance achieved1 linked violation
September 2, 2015State Other2 linked violations
September 2, 2015State Other1 linked violation
January 26, 2015State Violation/Reminder Notice1 linked violation
January 26, 2015State Compliance achieved1 linked violation
August 1, 2014State Compliance achieved1 linked violation
July 14, 2014State Violation/Reminder Notice1 linked violation
January 23, 2014State Violation/Reminder Notice1 linked violation
January 23, 2014State Compliance achieved1 linked violation
October 5, 2012State Violation/Reminder Notice1 linked violation
October 5, 2012State Violation/Reminder Notice1 linked violation
April 12, 2012State Public Notification requested1 linked violation
April 12, 2012State Violation/Reminder Notice1 linked violation
April 9, 2012State Compliance achieved1 linked violation
January 5, 2012State Public Notification received1 linked violation
December 21, 2011State Compliance achieved1 linked violation
December 20, 2011State Violation/Reminder Notice1 linked violation
December 20, 2011State Public Notification requested1 linked violation
November 17, 2011State Compliance achieved1 linked violation
September 9, 2011State Public Notification received1 linked violation
August 20, 2011State Public Notification requested1 linked violation
August 20, 2011State Violation/Reminder Notice1 linked violation
May 17, 2011State Public Notification requested1 linked violation
May 17, 2011State Public Notification received1 linked violation
May 17, 2011State Violation/Reminder Notice1 linked violation
May 17, 2011State Public Notification requested1 linked violation
May 17, 2011State Violation/Reminder Notice1 linked violation
May 6, 2011State Compliance achieved1 linked violation
February 28, 2011State Violation/Reminder Notice1 linked violation
February 28, 2011State Public Notification requested1 linked violation
February 14, 2011State Compliance achieved1 linked violation
February 1, 2011State Violation/Reminder Notice26 linked violations
February 1, 2011State Compliance achieved1 linked violation
February 1, 2011State Public Notification requested26 linked violations
January 31, 2011State Public Notification requested21 linked violations
January 31, 2011State Violation/Reminder Notice21 linked violations
December 20, 2010State Compliance achieved47 linked violations
December 17, 2010State Public Notification received1 linked violation
December 10, 2010State Violation/Reminder Notice1 linked violation
November 26, 2010State Public Notification requested1 linked violation
November 26, 2010State Violation/Reminder Notice1 linked violation
November 15, 2010State Violation/Reminder Notice1 linked violation
November 2, 2010State Compliance achieved1 linked violation
September 24, 2010State Compliance achieved1 linked violation
August 27, 2010State Compliance achieved1 linked violation
August 19, 2010State Public Notification requested1 linked violation
August 19, 2010State Violation/Reminder Notice1 linked violation
August 7, 2010State Public Notification requested1 linked violation
August 7, 2010State Violation/Reminder Notice1 linked violation
July 21, 2010State Public Notification requested1 linked violation
July 21, 2010State Violation/Reminder Notice1 linked violation
June 25, 2010State Compliance achieved1 linked violation
April 29, 2010State Compliance achieved6 linked violations
February 11, 2010State Compliance achieved1 linked violation
January 13, 2010State Public Notification requested1 linked violation
January 13, 2010State Violation/Reminder Notice1 linked violation
June 19, 2009State Public Notification requested1 linked violation
June 19, 2009State Violation/Reminder Notice1 linked violation
January 27, 2009State Public Notification requested1 linked violation
January 27, 2009State Public Notification requested1 linked violation
January 27, 2009State Violation/Reminder Notice1 linked violation
December 24, 2008State Compliance achieved12 linked violations
November 28, 2008State Compliance achieved22 linked violations
February 28, 2008State Compliance achieved1 linked violation
February 22, 2008State Public Notification requested1 linked violation
January 24, 2008State Compliance achieved15 linked violations
December 5, 2007State Public Notification received24 linked violations
July 31, 2007State Violation/Reminder Notice1 linked violation
July 31, 2007State Public Notification requested2 linked violations
March 28, 2007State Compliance achieved11 linked violations
January 18, 2007State Compliance achieved10 linked violations
October 23, 2006State Public Notification requested1 linked violation
October 20, 2006State Public Notification requested1 linked violation
October 20, 2006State Violation/Reminder Notice1 linked violation
October 18, 2006State Other14 linked violations
September 26, 2006State Public Notification requested3 linked violations
September 26, 2006State Public Notification requested1 linked violation
September 26, 2006State Violation/Reminder Notice1 linked violation
July 18, 2006State Violation/Reminder Notice2 linked violations
June 7, 2006State Compliance achieved1 linked violation
May 31, 2006State Compliance achieved1 linked violation
May 17, 2006State Public Notification requested6 linked violations
May 17, 2006State Violation/Reminder Notice1 linked violation
February 21, 2006State Compliance achieved6 linked violations
January 24, 2006State Other10 linked violations
December 1, 2005State Compliance achieved55 linked violations
August 19, 2005State Violation/Reminder Notice3 linked violations
April 7, 2005State Violation/Reminder Notice2 linked violations
April 7, 2005State Public Notification requested2 linked violations
April 7, 2005State Public Notification requested1 linked violation
April 7, 2005State Violation/Reminder Notice1 linked violation
April 7, 2005State Public Notification requested1 linked violation
April 7, 2005State Violation/Reminder Notice1 linked violation
April 7, 2005State Public Notification requested3 linked violations
April 7, 2005State Violation/Reminder Notice1 linked violation
January 4, 2005State Public Notification requested2 linked violations
January 4, 2005State Violation/Reminder Notice2 linked violations
January 4, 2005State Violation/Reminder Notice2 linked violations
January 3, 2005State Violation/Reminder Notice6 linked violations
January 3, 2005State Public Notification requested9 linked violations
January 3, 2005State Violation/Reminder Notice8 linked violations
January 3, 2005State Violation/Reminder Notice1 linked violation
March 8, 2004State Violation/Reminder Notice3 linked violations
August 19, 2003State Compliance achieved6 linked violations
June 26, 2003State Violation/Reminder Notice6 linked violations
December 2, 2002State Compliance achieved6 linked violations
July 12, 2002State Public Notification requested13 linked violations
July 12, 2002State Violation/Reminder Notice12 linked violations
July 5, 2002State Violation/Reminder Notice34 linked violations
June 29, 2002State Public Notification requested23 linked violations
June 3, 2002State Compliance achieved1 linked violation
September 24, 2001State Violation/Reminder Notice1 linked violation
September 24, 2001State Violation/Reminder Notice1 linked violation
September 24, 2001State Public Notification requested1 linked violation
September 24, 2001State Public Notification requested1 linked violation
August 13, 2001State Compliance achieved1 linked violation
July 9, 2001State Public Notification requested1 linked violation
July 9, 2001State Violation/Reminder Notice1 linked violation
April 30, 2001State Compliance achieved1 linked violation
June 21, 2000State Violation/Reminder Notice1 linked violation
June 21, 2000State Public Notification requested1 linked violation
June 21, 2000State Violation/Reminder Notice1 linked violation
November 25, 1996State Formal Notice of Violation issued3 linked violations

Contact

NORMAN, JASON

406-461-2749

BASIN, MT 59631