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

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

HARLOWTON 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.

HARLOWTON, MT · Wheatland County

HARLOWTON CITY OF Water System

Consumer Confidence Report status

HARLOWTON 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 HARLOWTON 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): MT0000240
System type: Community Water System
Population served: 1,050
Service connections: 573
Ownership: local government
Water source: groundwater (wells)

HARLOWTON CITY OF is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 1,050 people from groundwater.

As of August 1, 2026, its federal record holds 6 entries between 2005 and 2024, all of which EPA lists as closed.

Of the 6, 4 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 Consumer Confidence Rule, and the Lead and Copper Rule.

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2024 – October 1, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – July 18, 2023
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Arsenic
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2008 – December 31, 2010
Archived
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2005 – June 30, 2005
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
October 1, 2024 – October 1, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2023 – July 18, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Arsenic	—	Archived
January 1, 2005 – June 30, 2005	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved

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

Enforcement actions

July 18, 2025State Compliance achieved1 linked violation
July 18, 2025State Compliance achieved1 linked violation
July 17, 2025State Violation/Reminder Notice1 linked violation
October 1, 2024State Compliance achieved1 linked violation
October 1, 2024State Violation/Reminder Notice1 linked violation
July 30, 2024State Public Notification received1 linked violation
July 23, 2024State Violation/Reminder Notice1 linked violation
July 17, 2024State Public Notification requested1 linked violation
July 17, 2024State Compliance achieved1 linked violation
July 17, 2024State Violation/Reminder Notice1 linked violation
July 18, 2023State Compliance achieved1 linked violation
July 11, 2023State Violation/Reminder Notice1 linked violation
July 24, 2017State Compliance achieved2 linked violations
January 28, 2010State Compliance achieved4 linked violations
January 13, 2010State Violation/Reminder Notice2 linked violations
January 13, 2010State Violation/Reminder Notice1 linked violation
January 13, 2010State Public Notification requested3 linked violations
December 28, 2009State Compliance achieved1 linked violation
November 17, 2009State Violation/Reminder Notice1 linked violation
November 17, 2009State Public Notification requested1 linked violation
October 21, 2008State Violation/Reminder Notice2 linked violations
August 13, 2008State Violation/Reminder Notice2 linked violations
August 13, 2008State Public Notification requested2 linked violations
July 30, 2008State Violation/Reminder Notice1 linked violation
June 24, 2008State Compliance achieved1 linked violation
October 28, 2006State Public Notification requested1 linked violation
October 28, 2006State Violation/Reminder Notice1 linked violation
October 25, 2006State Administrative/Compliance Order without penalty issued9 linked violations
October 23, 2006State Violation/Reminder Notice1 linked violation
October 23, 2006State Public Notification requested1 linked violation
October 12, 2006State Compliance achieved9 linked violations
June 10, 2006State Violation/Reminder Notice1 linked violation
June 10, 2006State Public Notification requested1 linked violation
June 5, 2006State Other4 linked violations
April 3, 2006State Compliance achieved2 linked violations
January 4, 2005State Public Notification requested4 linked violations
January 3, 2005State Public Notification requested1 linked violation
January 3, 2005State Violation/Reminder Notice1 linked violation
January 3, 2005State Public Notification requested3 linked violations
June 26, 2003State Violation/Reminder Notice3 linked violations

Common questions

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

LEACH, ANITA

406-632-5523

HARLOWTON, MT 59036