Is HUNTLEY YELLOWSTONE CO WATER AND SEWER required to publish a Consumer Confidence Report?

Yes. HUNTLEY YELLOWSTONE CO WATER AND SEWER 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 HUNTLEY YELLOWSTONE CO WATER AND SEWER’s next Consumer Confidence Report due?

HUNTLEY YELLOWSTONE CO WATER AND SEWER’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.

HUNTLEY, MT · Yellowstone County

HUNTLEY YELLOWSTONE CO WATER AND SEWER Water System

Consumer Confidence Report status

HUNTLEY YELLOWSTONE CO WATER AND SEWER 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 HUNTLEY YELLOWSTONE CO WATER AND SEWER.

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): MT0000254
System type: Community Water System
Population served: 230
Service connections: 150
Ownership: local government
Water source: groundwater (wells)

HUNTLEY YELLOWSTONE CO WATER AND SEWER is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 230 people from groundwater.

As of August 1, 2026, its federal record holds 16 entries between 1996 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.

Of the 16, 11 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 inorganic chemicals, the Stage 1 Disinfectants and Disinfection Byproducts Rule, and the Lead and Copper Rule.

Violation history

Monitoring, Regular
—
Asbestos
January 1, 2020 – December 31, 2022
Resolved
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
April 10, 2017 – December 4, 2017
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2017 – December 31, 2017
Resolved
Sample Siting Plan Errors (RTCR)
—
Revised Total Coliform Rule
April 2, 2016 – January 10, 2017
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2014 – January 27, 2014
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2013 – December 26, 2013
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – December 31, 2013
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – October 23, 2008
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2005 – December 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2004 – December 31, 2004
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2004 – December 31, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 1996 – May 31, 1996
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
January 1, 2020 – December 31, 2022	Monitoring, Regular	Asbestos	—	Resolved
April 10, 2017 – December 4, 2017	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
January 1, 2017 – December 31, 2017	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
April 2, 2016 – January 10, 2017	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2014 – January 27, 2014	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
October 1, 2013 – December 26, 2013	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Asbestos	—	Archived
July 1, 2006 – October 23, 2008	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring and Reporting (DBP)	TTHM	—	Resolved
May 1, 1996 – May 31, 1996	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

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

Enforcement actions

January 24, 2023State Public Notification requested2 linked violations
January 24, 2023State Violation/Reminder Notice1 linked violation
March 5, 2018State Public Notification received1 linked violation
February 2, 2018State Compliance achieved1 linked violation
January 23, 2018State Violation/Reminder Notice1 linked violation
January 23, 2018State Public Notification requested1 linked violation
December 4, 2017State Compliance achieved1 linked violation
April 10, 2017State Public Notification requested1 linked violation
January 10, 2017State Compliance achieved1 linked violation
January 10, 2017State Public Notification received1 linked violation
January 4, 2017State Public Notification requested1 linked violation
January 4, 2017State Violation/Reminder Notice1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
January 24, 2014State Public Notification requested1 linked violation
January 23, 2014State Violation/Reminder Notice1 linked violation
December 26, 2013State Compliance achieved1 linked violation
December 30, 2008State no additional Formal Action needed1 linked violation
October 23, 2008State Compliance achieved1 linked violation
July 23, 2007State Compliance achieved2 linked violations
May 25, 2007State Compliance achieved6 linked violations
April 29, 2007State Violation/Reminder Notice2 linked violations
April 29, 2007State Public Notification requested2 linked violations
April 25, 2007State Other1 linked violation
January 14, 2007State Public Notification requested1 linked violation
January 14, 2007State Violation/Reminder Notice1 linked violation
February 10, 2006State Public Notification requested1 linked violation
February 10, 2006State Violation/Reminder Notice1 linked violation
February 24, 2005State Public Notification requested2 linked violations

Common questions

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

FOX, CHRISTINA

406-348-2517

HUNTLEY, MT 59037