MALMSTROM AIR FORCE BASE, MT · Cascade County

MALMSTROM AIR FORCE BASE 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): MT0000515
System type: Community Water System
Population served: 8,850
Service connections: 2
Ownership: federal government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
November 1, 2024 – November 30, 2024
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2024 – June 30, 2024
Resolved
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2024 – June 30, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – July 26, 2023
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2021 – January 5, 2022
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2020 – December 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2020 – December 31, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2019 – March 31, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2018 – December 31, 2018
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2017 – September 30, 2017
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2017 – September 30, 2017
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2010 – October 7, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2010 – June 30, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2009 – December 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2009 – September 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2009 – June 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2008 – December 31, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2005 – October 31, 2005
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2003 – October 2, 2003
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1998 – May 31, 1998
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
November 1, 2024 – November 30, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2024 – June 30, 2024	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
April 1, 2024 – June 30, 2024	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2023 – July 26, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
December 30, 2021 – January 5, 2022	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
October 1, 2020 – December 31, 2020	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2020 – December 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2019 – March 31, 2019	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2018 – December 31, 2018	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2017 – September 30, 2017	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2017 – September 30, 2017	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2010 – October 7, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2010 – June 30, 2010	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2009 – December 31, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2005 – October 31, 2005	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2003 – October 2, 2003	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
May 1, 1998 – May 31, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

January 13, 2021State Compliance achieved283 linked violations
June 28, 2010Federal Final Administrative Order issued5 linked violations

Contact

341ST MEDICAL GROUP OMRS SGXB

406-731-1580

MALMSTROM AIR FORCE BASE, MT 59402