Is BIG MOUNTAIN WATER COMPANY required to publish a Consumer Confidence Report?

Yes. BIG MOUNTAIN WATER COMPANY is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is BIG MOUNTAIN WATER COMPANY’s next Consumer Confidence Report due?

BIG MOUNTAIN WATER COMPANY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

WHITEFISH, MT · Flathead County

BIG MOUNTAIN WATER COMPANY Water System

Consumer Confidence Report status

BIG MOUNTAIN WATER COMPANY must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for BIG MOUNTAIN WATER COMPANY.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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): MT0000060
System type: Community Water System
Population served: 2,435
Service connections: 379
Ownership: privately owned
Water source: groundwater (wells)

BIG MOUNTAIN WATER COMPANY is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 2,435 people from groundwater.

As of August 1, 2026, its federal record holds 157 entries between 1996 and 2024, all of which EPA lists as closed.

Of the 157, 155 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, synthetic organic chemicals, and the Total Coliform Rules.

Violation history

Monitoring, Regular
—
Endrin
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
LASSO
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Picloram
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Simazine
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2024 – March 31, 2024
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2014 – October 31, 2014
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 2014 – June 20, 2014
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2014 – June 20, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2012 – July 16, 2012
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2009 – March 31, 2009
Resolved
Monitoring, Regular
—
Vinyl chloride
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Styrene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Ethylbenzene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Toluene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Benzene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
CHLOROBENZENE
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Tetrachloroethylene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Trichloroethylene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Carbon tetrachloride
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Xylenes, Total
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Styrene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Toluene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Benzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2008 – March 31, 2008
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – March 1, 2007
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Benzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Toluene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Styrene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Styrene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Ethylbenzene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Toluene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Benzene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
CHLOROBENZENE
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Tetrachloroethylene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Trichloroethylene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Carbon tetrachloride
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Vinyl chloride
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Xylenes, Total
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Styrene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Ethylbenzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Toluene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Benzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
CHLOROBENZENE
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Tetrachloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Trichloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Carbon tetrachloride
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Vinyl chloride
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Xylenes, Total
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Styrene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Toluene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Benzene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 1996 – June 30, 1996
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
June 1, 1996 – June 30, 1996
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
May 1, 1996 – May 31, 1996
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2024 – March 31, 2024	Monitoring, Regular	Endrin	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	LASSO	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Picloram	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Simazine	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	BHC-GAMMA	—	Resolved
October 1, 2014 – October 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 2014 – June 20, 2014	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
April 1, 2014 – June 20, 2014	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
July 1, 2012 – July 16, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Asbestos	—	Resolved
January 1, 2009 – March 31, 2009	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Vinyl chloride	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Styrene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Ethylbenzene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Toluene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Benzene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	CHLOROBENZENE	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Tetrachloroethylene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Trichloroethylene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Carbon tetrachloride	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Xylenes, Total	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Styrene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Toluene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Benzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
July 1, 2006 – March 1, 2007	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Benzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Toluene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Styrene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Styrene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Ethylbenzene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Toluene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Benzene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	CHLOROBENZENE	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Tetrachloroethylene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Trichloroethylene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Carbon tetrachloride	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Vinyl chloride	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Xylenes, Total	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Styrene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Ethylbenzene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Toluene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Benzene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	CHLOROBENZENE	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Tetrachloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Trichloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Carbon tetrachloride	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Vinyl chloride	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Xylenes, Total	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Styrene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Toluene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Benzene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
June 1, 1996 – June 30, 1996	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 1996 – June 30, 1996	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 1996 – May 31, 1996	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

January 22, 2026State Public Notification requested23 linked violations
January 22, 2026State Violation/Reminder Notice23 linked violations
August 12, 2025State Compliance achieved23 linked violations
November 11, 2014State Public Notification received1 linked violation
November 2, 2014State Compliance achieved1 linked violation
October 24, 2014State Violation/Reminder Notice1 linked violation
October 24, 2014State Public Notification requested1 linked violation
October 24, 2014State Violation/Reminder Notice1 linked violation
July 15, 2014State Violation/Reminder Notice2 linked violations
July 15, 2014State Violation/Reminder Notice1 linked violation
July 15, 2014State Public Notification requested1 linked violation
July 15, 2014State Public Notification requested1 linked violation
June 20, 2014State Compliance achieved1 linked violation
June 20, 2014State Compliance achieved2 linked violations
March 10, 2014State Public Notification received1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
January 24, 2014State Public Notification requested1 linked violation
January 23, 2014State Compliance achieved1 linked violation
August 15, 2012State Public Notification requested3 linked violations
July 16, 2012State Compliance achieved1 linked violation
May 4, 2009State Violation/Reminder Notice2 linked violations
January 4, 2005State Public Notification requested2 linked violations

Common questions

Is BIG MOUNTAIN WATER COMPANY required to publish a Consumer Confidence Report?: Yes. BIG MOUNTAIN WATER COMPANY is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is BIG MOUNTAIN WATER COMPANY’s next Consumer Confidence Report due?: BIG MOUNTAIN WATER COMPANY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does BIG MOUNTAIN WATER COMPANY have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for BIG MOUNTAIN WATER COMPANY.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

MAKI, GINA

406-862-2905

WHITEFISH, MT 59937