Is HARDIN CITY OF required to publish a Consumer Confidence Report?

Yes. HARDIN CITY OF 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 HARDIN CITY OF’s next Consumer Confidence Report due?

HARDIN CITY OF’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.

HARDIN, MT · Big Horn County

HARDIN CITY OF Water System

Consumer Confidence Report status

HARDIN CITY OF 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 HARDIN CITY OF.

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): MT0000235
System type: Community Water System
Population served: 3,500
Service connections: 1,307
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

HARDIN CITY OF serves 3,500 people from surface water, placing it in the 3,301 to 10,000 people size category.

As of August 1, 2026, its federal record holds 19 entries between 1994 and 2025, all of which EPA lists as closed.

Of the 19, 14 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 the Stage 2 Disinfectants and Disinfection Byproducts Rule, the Stage 1 Disinfectants and Disinfection Byproducts Rule, and the Consumer Confidence Rule.

Violation history

Monitoring and Reporting (DBP)
—
TTHM
April 1, 2025 – June 30, 2025
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2025 – June 30, 2025
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
September 1, 2020 – August 31, 2021
Resolved
Monitoring and Reporting (DBP)
—
TTHM
September 1, 2020 – August 31, 2021
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2014 – January 27, 2014
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2013 – July 18, 2013
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – August 20, 2012
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2010 – July 27, 2010
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2002 – December 31, 2010
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
January 1, 1996 – January 31, 1996
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 1995 – April 30, 1995
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 1994 – August 31, 1994
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 1994 – April 30, 1994
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
March 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 1994 – December 31, 1994
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
April 1, 2025 – June 30, 2025	Monitoring and Reporting (DBP)	TTHM	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
September 1, 2020 – August 31, 2021	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
September 1, 2020 – August 31, 2021	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2014 – January 27, 2014	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2013 – July 18, 2013	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2012 – August 20, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2010 – July 27, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
January 1, 2002 – December 31, 2010	Monitoring, Regular	Asbestos	—	Archived
January 1, 1996 – January 31, 1996	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
April 1, 1995 – April 30, 1995	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 1994 – August 31, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
April 1, 1994 – April 30, 1994	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
March 1, 1994 – March 31, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	CYANIDE	—	Resolved

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

Enforcement actions

November 5, 2025State Public Notification received2 linked violations
July 14, 2025State Compliance achieved3 linked violations
July 14, 2025State Public Notification requested2 linked violations
July 14, 2025State Violation/Reminder Notice2 linked violations
October 28, 2021State Compliance achieved2 linked violations
January 23, 2014State Violation/Reminder Notice1 linked violation
July 18, 2013State Compliance achieved1 linked violation
July 16, 2013State Violation/Reminder Notice3 linked violations
July 12, 2012State Public Notification requested3 linked violations
August 7, 2010State Public Notification requested2 linked violations
July 27, 2010State Compliance achieved2 linked violations
January 6, 2009State Compliance achieved5 linked violations
November 7, 2008State no additional Formal Action needed1 linked violation
November 6, 2006State Compliance achieved3 linked violations
February 24, 2005State Violation/Reminder Notice14 linked violations
February 24, 2005State Public Notification requested22 linked violations
December 2, 2002State Compliance achieved4 linked violations

Common questions

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

HURFF JR, MICHAEL D

406-665-9260

HARDIN, MT 59034