Is OILMONT COUNTY WATER DISTRICT required to publish a Consumer Confidence Report?

Yes. OILMONT COUNTY WATER DISTRICT 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 OILMONT COUNTY WATER DISTRICT’s next Consumer Confidence Report due?

OILMONT COUNTY WATER DISTRICT’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.

SUNBURST, MT · Toole County

OILMONT COUNTY WATER DISTRICT Water System

Consumer Confidence Report status

OILMONT COUNTY WATER DISTRICT 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 OILMONT COUNTY WATER DISTRICT.

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): MT0000587
System type: Community Water System
Population served: 300
Service connections: 76
Ownership: local government
Water source: groundwater (wells)

OILMONT COUNTY WATER DISTRICT is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 300 people from groundwater.

As of August 1, 2026, its federal record holds 115 entries between 1995 and 2024, all of which EPA lists as closed.

Of the 115, 80 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, the Total Coliform Rules, and the Groundwater Rule.

Violation history

Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024 – July 29, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – July 13, 2023
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
September 1, 2022 – September 30, 2022
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
April 1, 2021 – April 30, 2021
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
February 1, 2021 – February 28, 2021
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2020 – August 10, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – July 27, 2020
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2020 – December 31, 2022
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
January 1, 2020 – January 31, 2020
Resolved
Monitoring, Regular
—
Styrene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Toluene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Benzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2020 – December 31, 2022
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
November 1, 2019 – November 30, 2019
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
February 1, 2019 – February 28, 2019
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
November 1, 2018 – November 30, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
October 1, 2018 – October 31, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2018 – July 20, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
March 1, 2018 – March 31, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
February 1, 2018 – February 28, 2018
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2018 – December 31, 2018
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2018 – December 31, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
August 1, 2017 – August 31, 2017
Resolved
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2017 – June 30, 2017
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2017 – June 30, 2017
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
Benzene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
Toluene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
Styrene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2017 – December 23, 2019
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2017 – December 23, 2019
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2015 – February 1, 2016
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2015 – October 31, 2015
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
June 1, 2015 – June 30, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2015 – May 31, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 2015 – April 30, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 2015 – March 31, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 2015 – February 28, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2015 – January 31, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 2014 – December 31, 2014
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2014 – October 23, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2014 – October 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2014 – September 30, 2014
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
August 1, 2014 – August 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2014 – June 30, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2014 – May 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 2014 – April 30, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2013 – May 31, 2013
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
April 1, 2013 – April 30, 2013
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
March 1, 2013 – March 31, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2012 – August 31, 2012
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
July 1, 2012 – April 26, 2013
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2012 – February 28, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2011 – June 30, 2011
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
April 1, 2011 – April 30, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 2011 – April 30, 2011
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
October 13, 2010 – November 10, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2010 – October 31, 2010
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2010 – July 25, 2011
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
May 1, 2010 – November 15, 2010
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
May 1, 2010 – November 15, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2010 – May 31, 2010
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 2010 – April 30, 2010
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 2010 – March 31, 2010
Archived
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2006 – December 31, 2006
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2004 – May 31, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 2003 – April 30, 2003
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 1999 – May 31, 1999
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
February 1, 1995 – February 28, 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
July 1, 2024 – July 29, 2024	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2023 – July 13, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
September 1, 2022 – September 30, 2022	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
April 1, 2021 – April 30, 2021	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
February 1, 2021 – February 28, 2021	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
October 1, 2020 – August 10, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2020 – July 27, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2020 – January 31, 2020	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Styrene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Toluene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Benzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	CHLOROBENZENE	—	Resolved
November 1, 2019 – November 30, 2019	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
February 1, 2019 – February 28, 2019	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
November 1, 2018 – November 30, 2018	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
October 1, 2018 – October 31, 2018	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
July 1, 2018 – July 20, 2018	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
March 1, 2018 – March 31, 2018	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
February 1, 2018 – February 28, 2018	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
January 1, 2018 – December 31, 2018	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2018 – December 31, 2018	Monitoring and Reporting (DBP)	TTHM	—	Resolved
August 1, 2017 – August 31, 2017	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
April 1, 2017 – June 30, 2017	Monitoring and Reporting (DBP)	TTHM	—	Resolved
April 1, 2017 – June 30, 2017	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	Benzene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	Toluene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	Styrene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2017 – December 23, 2019	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
December 30, 2015 – February 1, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
October 1, 2015 – October 31, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 2015 – June 30, 2015	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 2015 – May 31, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 2015 – April 30, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
March 1, 2015 – March 31, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
February 1, 2015 – February 28, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2015 – January 31, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
December 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2014 – October 23, 2014	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2014 – October 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2014 – August 31, 2014	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
June 1, 2014 – June 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 2014 – May 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 2014 – April 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 2013 – May 31, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 2013 – April 30, 2013	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
March 1, 2013 – March 31, 2013	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2012 – August 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2012 – April 26, 2013	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
January 1, 2012 – February 28, 2012	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
June 1, 2011 – June 30, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 2011 – April 30, 2011	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2011 – April 30, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 13, 2010 – November 10, 2010	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
October 1, 2010 – October 31, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
October 1, 2010 – July 25, 2011	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
May 1, 2010 – November 15, 2010	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
May 1, 2010 – November 15, 2010	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
May 1, 2010 – May 31, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
April 1, 2010 – April 30, 2010	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
March 1, 2010 – March 31, 2010	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
May 1, 2004 – May 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 2003 – April 30, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 1999 – May 31, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
February 1, 1995 – February 28, 1995	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved

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

Enforcement actions

July 29, 2024State Compliance achieved1 linked violation
July 13, 2023State Compliance achieved3 linked violations
July 11, 2023State Violation/Reminder Notice1 linked violation
January 29, 2023State Violation/Reminder Notice21 linked violations
January 29, 2023State Public Notification requested21 linked violations
January 29, 2023State Violation/Reminder Notice23 linked violations
January 29, 2023State Public Notification requested1 linked violation
January 29, 2023State Violation/Reminder Notice1 linked violation
January 29, 2023State Public Notification requested21 linked violations
January 29, 2023State Public Notification requested21 linked violations
January 29, 2023State Violation/Reminder Notice21 linked violations
January 29, 2023State Public Notification requested1 linked violation
January 29, 2023State Violation/Reminder Notice1 linked violation
January 29, 2023State Public Notification requested21 linked violations
January 29, 2023State Violation/Reminder Notice21 linked violations
January 29, 2023State Public Notification requested21 linked violations
January 29, 2023State Public Notification requested2 linked violations
January 29, 2023State Public Notification requested22 linked violations
January 29, 2023State Violation/Reminder Notice22 linked violations
January 29, 2023State Violation/Reminder Notice22 linked violations
January 29, 2023State Public Notification requested3 linked violations
January 29, 2023State Public Notification requested22 linked violations
January 29, 2023State Public Notification requested22 linked violations
January 29, 2023State Violation/Reminder Notice2 linked violations
January 29, 2023State Public Notification requested23 linked violations
January 29, 2023State Violation/Reminder Notice22 linked violations
January 9, 2023State Compliance achieved22 linked violations
January 9, 2023State Compliance achieved1 linked violation
January 9, 2023State Compliance achieved22 linked violations
January 9, 2023State Compliance achieved22 linked violations
January 9, 2023State Compliance achieved2 linked violations
January 9, 2023State Compliance achieved23 linked violations
January 9, 2023State Compliance achieved2 linked violations
January 9, 2023State Compliance achieved21 linked violations
January 9, 2023State Compliance achieved1 linked violation
January 9, 2023State Compliance achieved27 linked violations
January 9, 2023State Compliance achieved7 linked violations
January 9, 2023State Compliance achieved21 linked violations
January 9, 2023State Compliance achieved2 linked violations
January 9, 2023State Compliance achieved21 linked violations
January 9, 2023State Compliance achieved21 linked violations
January 9, 2023State Compliance achieved24 linked violations
December 29, 2022State Public Notification received2 linked violations
December 29, 2022State Public Notification received4 linked violations
November 1, 2022State Public Notification requested2 linked violations
November 1, 2022State Public Notification requested3 linked violations
August 10, 2021State Compliance achieved2 linked violations
June 30, 2021State Public Notification received1 linked violation
June 30, 2021State Public Notification received1 linked violation
June 30, 2021State Compliance achieved2 linked violations
May 25, 2021State Public Notification received1 linked violation
May 25, 2021State Compliance achieved1 linked violation
May 24, 2021State Public Notification requested1 linked violation
April 15, 2021State Public Notification requested1 linked violation
March 23, 2021State Compliance achieved1 linked violation
March 12, 2021State Violation/Reminder Notice1 linked violation
October 20, 2020State Public Notification requested1 linked violation
July 27, 2020State Compliance achieved1 linked violation
July 20, 2020State Violation/Reminder Notice8 linked violations
March 5, 2020State Compliance achieved1 linked violation
February 19, 2020State Public Notification received1 linked violation
February 12, 2020State Public Notification requested1 linked violation
February 12, 2020State Violation/Reminder Notice1 linked violation
January 22, 2020State Violation/Reminder Notice21 linked violations
January 22, 2020State Public Notification requested21 linked violations
January 6, 2020State Compliance achieved1 linked violation
January 2, 2020State Public Notification received1 linked violation
December 23, 2019State Compliance achieved21 linked violations
December 17, 2019State Public Notification requested1 linked violation
December 17, 2019State Violation/Reminder Notice1 linked violation
August 15, 2019State Compliance achieved2 linked violations
April 3, 2019State Public Notification received1 linked violation
March 14, 2019State Public Notification requested1 linked violation
March 14, 2019State Violation/Reminder Notice1 linked violation
March 12, 2019State Compliance achieved1 linked violation
January 6, 2019State Compliance achieved1 linked violation
January 6, 2019State Compliance achieved1 linked violation
December 14, 2018State Violation/Reminder Notice1 linked violation
December 14, 2018State Public Notification requested1 linked violation
December 10, 2018State Public Notification requested1 linked violation
December 10, 2018State Violation/Reminder Notice1 linked violation
October 18, 2018State Public Notification requested2 linked violations
October 18, 2018State Violation/Reminder Notice2 linked violations
July 20, 2018State Compliance achieved1 linked violation
July 17, 2018State Violation/Reminder Notice1 linked violation
May 8, 2018State Compliance achieved1 linked violation
April 26, 2018State Public Notification received3 linked violations
April 13, 2018State Public Notification requested1 linked violation
April 13, 2018State Violation/Reminder Notice1 linked violation
March 26, 2018State Public Notification received2 linked violations
March 14, 2018State Public Notification requested1 linked violation
March 14, 2018State Violation/Reminder Notice1 linked violation
October 4, 2017State Compliance achieved1 linked violation
October 4, 2017State Public Notification received1 linked violation
September 18, 2017State Violation/Reminder Notice1 linked violation
September 18, 2017State Public Notification requested1 linked violation
September 18, 2017State Compliance achieved2 linked violations
July 18, 2017State Public Notification requested2 linked violations
July 18, 2017State Violation/Reminder Notice2 linked violations
February 1, 2016State Compliance achieved1 linked violation
February 1, 2016State Violation/Reminder Notice1 linked violation
December 4, 2015State Public Notification received1 linked violation
November 19, 2015State Compliance achieved1 linked violation
November 16, 2015State Public Notification requested1 linked violation
November 16, 2015State Violation/Reminder Notice1 linked violation
July 15, 2015State Violation/Reminder Notice1 linked violation
July 15, 2015State Public Notification requested1 linked violation
July 14, 2015State Compliance achieved3 linked violations
July 14, 2015State Compliance achieved1 linked violation
July 14, 2015State Compliance achieved1 linked violation
July 14, 2015State Compliance achieved2 linked violations
July 14, 2015State Compliance achieved2 linked violations
July 14, 2015State Compliance achieved2 linked violations
July 14, 2015State Compliance achieved1 linked violation
May 20, 2015State Violation/Reminder Notice5 linked violations
May 20, 2015State Public Notification requested7 linked violations
May 11, 2015State Violation/Reminder Notice2 linked violations
May 11, 2015State Violation/Reminder Notice1 linked violation
April 2, 2015State Public Notification received1 linked violation
March 20, 2015State Public Notification requested1 linked violation
March 20, 2015State Violation/Reminder Notice1 linked violation
March 12, 2015State Public Notification received1 linked violation
February 17, 2015State Public Notification received1 linked violation
February 13, 2015State Violation/Reminder Notice1 linked violation
February 13, 2015State Public Notification requested1 linked violation
February 13, 2015State Violation/Reminder Notice1 linked violation
February 9, 2015State Public Notification requested1 linked violation
February 9, 2015State Violation/Reminder Notice1 linked violation
February 9, 2015State Violation/Reminder Notice1 linked violation
December 24, 2014State Public Notification received1 linked violation
December 19, 2014State Public Notification requested1 linked violation
December 19, 2014State Violation/Reminder Notice1 linked violation
December 19, 2014State Violation/Reminder Notice1 linked violation
December 4, 2014State Administrative/Compliance Order without penalty issued1 linked violation
December 4, 2014State Administrative/Compliance Order without penalty issued1 linked violation
December 4, 2014State Administrative/Compliance Order without penalty issued3 linked violations
December 4, 2014State Administrative/Compliance Order without penalty issued1 linked violation
December 4, 2014State Administrative/Compliance Order without penalty issued1 linked violation
November 12, 2014State Compliance achieved1 linked violation
November 12, 2014State Compliance achieved1 linked violation
October 23, 2014State Public Notification requested3 linked violations
October 23, 2014State Violation/Reminder Notice3 linked violations
October 9, 2014State Violation/Reminder Notice1 linked violation
October 9, 2014State Violation/Reminder Notice1 linked violation
October 9, 2014State Public Notification requested1 linked violation
September 19, 2014State Public Notification received1 linked violation
September 11, 2014State Other1 linked violation
September 11, 2014State Other1 linked violation
September 11, 2014State Other1 linked violation
September 11, 2014State Other6 linked violations
September 11, 2014State Other1 linked violation
September 11, 2014State Other1 linked violation
September 8, 2014State Other2 linked violations
September 5, 2014State Violation/Reminder Notice1 linked violation
September 5, 2014State Public Notification requested1 linked violation
August 27, 2014State Violation/Reminder Notice1 linked violation
August 27, 2014State Boil Water Order1 linked violation
August 27, 2014State Public Notification requested1 linked violation
August 27, 2014State Violation/Reminder Notice1 linked violation
June 20, 2014State Violation/Reminder Notice2 linked violations
June 20, 2014State Public Notification requested2 linked violations
May 21, 2014State Public Notification requested2 linked violations
April 23, 2014State Public Notification requested4 linked violations
May 10, 2013State Public Notification requested4 linked violations
May 10, 2013State Violation/Reminder Notice3 linked violations
April 11, 2013State Public Notification received2 linked violations
April 11, 2013State Public Notification received4 linked violations
April 8, 2013State Public Notification requested4 linked violations
April 8, 2013State Boil Water Order3 linked violations
March 25, 2013State Violation/Reminder Notice1 linked violation
March 25, 2013State Public Notification requested1 linked violation
March 25, 2013State Boil Water Order2 linked violations
September 17, 2012State Violation/Reminder Notice1 linked violation
September 5, 2012State Compliance achieved1 linked violation
February 28, 2012State Compliance achieved1 linked violation
February 15, 2012State Violation/Reminder Notice1 linked violation
July 25, 2011State Compliance achieved1 linked violation
July 19, 2011State Compliance achieved1 linked violation
June 27, 2011State Public Notification received1 linked violation
June 17, 2011State Public Notification requested1 linked violation
June 17, 2011State Violation/Reminder Notice1 linked violation
June 17, 2011State Violation/Reminder Notice1 linked violation
May 20, 2011State Administrative/Compliance Order with penalty issued11 linked violations
May 19, 2011State Compliance achieved1 linked violation
May 19, 2011State Compliance achieved1 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 17, 2011State Public Notification requested1 linked violation
May 15, 2011State Public Notification received1 linked violation
May 6, 2011State Public Notification requested1 linked violation
May 6, 2011State Violation/Reminder Notice1 linked violation
May 6, 2011State Violation/Reminder Notice1 linked violation
December 10, 2010State Public Notification received1 linked violation
December 10, 2010State Public Notification received1 linked violation
December 10, 2010State Public Notification received2 linked violations
November 16, 2010State Other2 linked violations
November 16, 2010State Other8 linked violations
November 16, 2010State Public Notification requested1 linked violation
November 16, 2010State Violation/Reminder Notice1 linked violation
November 10, 2010State Violation/Reminder Notice2 linked violations
November 1, 2010State Compliance achieved1 linked violation
October 30, 2010State Public Notification requested2 linked violations
July 12, 2010State Violation/Reminder Notice2 linked violations
July 12, 2010State Other4 linked violations
July 12, 2010State Public Notification requested2 linked violations
July 12, 2010State Public Notification requested2 linked violations
July 1, 2010State Compliance achieved2 linked violations
June 17, 2010State Compliance achieved2 linked violations
April 26, 2010State Violation/Reminder Notice3 linked violations
March 25, 2010State Public Notification requested1 linked violation
March 25, 2010State Violation/Reminder Notice2 linked violations
March 25, 2010State Violation/Reminder Notice1 linked violation
January 23, 2007State Compliance achieved9 linked violations
April 18, 2003State Public Notification requested16 linked violations

Common questions

Is OILMONT COUNTY WATER DISTRICT required to publish a Consumer Confidence Report?: Yes. OILMONT COUNTY WATER DISTRICT 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 OILMONT COUNTY WATER DISTRICT’s next Consumer Confidence Report due?: OILMONT COUNTY WATER DISTRICT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does OILMONT COUNTY WATER DISTRICT have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for OILMONT COUNTY WATER DISTRICT.
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

WALLEWEIN, MICHAEL J

406-937-2775

SUNBURST, MT 59482