ANTELOPE, MT · Sheridan County

ANTELOPE COUNTY WATER AND SEWER Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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): MT0003203
System type: Community Water System
Population served: 59
Service connections: 36
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2025 – December 31, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2024 – December 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2023 – June 30, 2023
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2023 – October 18, 2023
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2023 – October 18, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2021 – December 31, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2021 – August 23, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – August 7, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2020 – January 31, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2019 – September 30, 2019
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
August 31, 2019 – August 30, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2015 – June 30, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2015 – June 30, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2015 – March 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2015 – March 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2014 – September 30, 2014
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2014 – September 30, 2014
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2011 – December 7, 2011
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2010 – April 25, 2013
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – February 21, 2007
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 1999 – June 30, 1999
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1997 – May 31, 1997
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1996 – June 30, 1996
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 1995 – October 31, 1995
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
December 1, 2025 – December 31, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2024 – December 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
June 1, 2023 – June 30, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2023 – October 18, 2023	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2023 – October 18, 2023	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 1, 2021 – December 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2021 – August 23, 2021	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2020 – August 7, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2020 – January 31, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
September 1, 2019 – September 30, 2019	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 31, 2019 – August 30, 2020	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
April 1, 2015 – June 30, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2015 – June 30, 2015	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2015 – March 31, 2015	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2015 – March 31, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2014 – September 30, 2014	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2011 – December 7, 2011	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2010 – April 25, 2013	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2006 – February 21, 2007	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 1, 1999 – June 30, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 1997 – May 31, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 1996 – June 30, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 1995 – October 31, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

January 22, 2026State Compliance achieved1 linked violation
January 22, 2026State Public Notification requested6 linked violations
January 22, 2026State Violation/Reminder Notice1 linked violation
January 15, 2025State Violation/Reminder Notice1 linked violation
January 15, 2025State Compliance achieved1 linked violation
January 15, 2025State Public Notification requested1 linked violation
January 6, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 18, 2023State Compliance achieved2 linked violations
October 18, 2023State Public Notification requested2 linked violations
October 18, 2023State Violation/Reminder Notice2 linked violations
July 13, 2023State Public Notification requested1 linked violation
July 13, 2023State Violation/Reminder Notice1 linked violation
July 10, 2023State Compliance achieved1 linked violation
February 3, 2022State Public Notification requested1 linked violation
February 3, 2022State Violation/Reminder Notice1 linked violation
January 19, 2022State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
January 19, 2022State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 11, 2022State Compliance achieved1 linked violation
August 23, 2021State Compliance achieved1 linked violation
August 12, 2021State Compliance achieved2 linked violations
July 19, 2021State Violation/Reminder Notice1 linked violation
October 19, 2020State Public Notification requested2 linked violations
October 19, 2020State Violation/Reminder Notice2 linked violations
August 7, 2020State Compliance achieved1 linked violation
July 20, 2020State Violation/Reminder Notice1 linked violation
February 21, 2020State Violation/Reminder Notice1 linked violation
February 21, 2020State Public Notification requested1 linked violation
February 5, 2020State Compliance achieved1 linked violation
November 13, 2019State Compliance achieved1 linked violation
October 16, 2019State Violation/Reminder Notice1 linked violation
October 16, 2019State Public Notification requested1 linked violation
November 25, 2015State no additional Formal Action needed10 linked violations
August 7, 2015State Compliance achieved1 linked violation
August 7, 2015State Compliance achieved1 linked violation
August 7, 2015State Compliance achieved3 linked violations
August 7, 2015State Compliance achieved1 linked violation
August 7, 2015State Compliance achieved2 linked violations
August 7, 2015State Compliance achieved1 linked violation
August 7, 2015State Compliance achieved1 linked violation
August 7, 2015State Compliance achieved1 linked violation
May 29, 2015State Violation/Reminder Notice1 linked violation
May 29, 2015State Public Notification requested1 linked violation
May 29, 2015State Public Notification requested1 linked violation
May 29, 2015State Violation/Reminder Notice1 linked violation
April 20, 2015State Public Notification requested1 linked violation
April 20, 2015State Violation/Reminder Notice1 linked violation
April 20, 2015State Public Notification requested1 linked violation
April 20, 2015State Violation/Reminder Notice1 linked violation
February 10, 2015State Public Notification received2 linked violations
January 12, 2015State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 12, 2015State Public Notification requested2 linked violations
January 7, 2015State Compliance achieved1 linked violation
November 7, 2014State Public Notification received2 linked violations
October 24, 2014State Other2 linked violations
October 24, 2014State Othergeneral compliance action — not tied to a specific violation on record
October 24, 2014State Other2 linked violations
October 24, 2014State Other2 linked violations
October 17, 2014State Violation/Reminder Notice1 linked violation
October 17, 2014State Public Notification requested1 linked violation
October 17, 2014State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
October 16, 2014State Violation/Reminder Notice1 linked violation
October 16, 2014State Public Notification requested1 linked violation
October 16, 2014State Violation/Reminder Notice1 linked violation
October 16, 2014State Public Notification requested1 linked violation
August 4, 2014State Public Notification received1 linked violation
July 15, 2014State Violation/Reminder Notice1 linked violation
July 15, 2014State Public Notification requested1 linked violation
October 24, 2013State Compliance achieved1 linked violation
October 18, 2013State Violation/Reminder Notice1 linked violation
October 15, 2013State Violation/Reminder Notice2 linked violations
October 15, 2013State Public Notification requested2 linked violations
October 1, 2013State Intentional no-action2 linked violations
April 25, 2013State Compliance achieved1 linked violation
November 6, 2012State Compliance achieved1 linked violation
October 23, 2012State Violation/Reminder Notice1 linked violation
October 23, 2012State Public Notification requested1 linked violation
June 18, 2012State Violation/Reminder Notice1 linked violation
June 18, 2012State Public Notification requested1 linked violation
May 24, 2012State Compliance achieved1 linked violation
May 24, 2012State Compliance achieved1 linked violation
December 7, 2011State Compliance achieved1 linked violation
October 31, 2011State Public Notification requested1 linked violation
October 31, 2011State Violation/Reminder Notice1 linked violation
January 14, 2011State Violation/Reminder Notice1 linked violation
February 18, 2010State Compliance achieved1 linked violation
January 24, 2010State Public Notification requested1 linked violation
January 24, 2010State Violation/Reminder Notice1 linked violation
December 24, 2008State Compliance achieved5 linked violations
February 21, 2007State Compliance achieved1 linked violation
February 5, 2007State Violation/Reminder Notice1 linked violation
October 26, 2006State Compliance achieved1 linked violation
February 10, 2006State Public Notification requested1 linked violation
February 10, 2006State Violation/Reminder Notice1 linked violation
January 19, 2002State Public Notification requested1 linked violation
May 21, 2001State Compliance achieved1 linked violation
July 3, 1997State Violation/Reminder Notice3 linked violations
July 31, 1996State Violation/Reminder Notice1 linked violation

Contact

FELLON, MICHELLE

406-480-0791

ANTELOPE, MT 59211