NASHUA, MT · Valley County

NASHUA TOWN OF Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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): MT0000297
System type: Community Water System
Population served: 300
Service connections: 191
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2025 – September 30, 2025
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2025
Unaddressed
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024 – September 13, 2024
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2024 – December 31, 2024
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2024 – December 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2023 – September 30, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2023 – August 31, 2023
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
Lead Consumer Notice
—
Lead and Copper Rule
September 29, 2022 – October 17, 2022
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2022 – September 16, 2022
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
April 1, 2022 – April 4, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2021 – September 30, 2021
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2021 – September 13, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2021 – July 31, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2021 – June 30, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2021 – April 30, 2021
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
April 1, 2021 – October 21, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2021 – January 31, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2020 – December 31, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
November 1, 2020 – November 30, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
September 1, 2020 – August 31, 2021
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
September 1, 2020 – August 31, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2020 – July 31, 2020
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2020 – August 24, 2020
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2020 – August 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2020 – August 31, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2019 – December 31, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2018 – October 31, 2018
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2018 – August 31, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2018 – July 27, 2018
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2018 – February 28, 2018
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2017 – June 20, 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, 2017 – July 27, 2017
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2017 – March 31, 2017
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2017 – March 31, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
November 1, 2016 – November 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2016 – June 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2016 – March 31, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2015 – December 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2015 – March 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2015 – March 31, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2009 – October 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2009 – September 30, 2009
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1997 – June 30, 1997
Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

Period	Violation	Contaminant / rule	Health-based	Status
September 1, 2025 – September 30, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Unaddressed
July 1, 2024 – September 13, 2024	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2024 – December 31, 2024	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2024 – December 31, 2024	Monitoring and Reporting (DBP)	TTHM	—	Resolved
September 1, 2023 – September 30, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 1, 2023 – August 31, 2023	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
September 29, 2022 – October 17, 2022	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2022 – September 16, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2022 – April 4, 2022	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
September 1, 2021 – September 30, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2021 – September 13, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2021 – July 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
June 1, 2021 – June 30, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2021 – April 30, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2021 – October 21, 2022	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2021 – January 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2020 – December 31, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
November 1, 2020 – November 30, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
September 1, 2020 – August 31, 2021	Monitoring and Reporting (DBP)	TTHM	—	Resolved
September 1, 2020 – August 31, 2021	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2020 – July 31, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2020 – August 24, 2020	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2020 – August 31, 2020	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2020 – August 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 1, 2019 – December 31, 2019	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2018 – October 31, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 1, 2018 – August 31, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2018 – July 27, 2018	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
February 1, 2018 – February 28, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2017 – June 20, 2018	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	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, 2017 – July 27, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2017 – March 31, 2017	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2017 – March 31, 2017	Monitoring and Reporting (DBP)	TTHM	—	Resolved
November 1, 2016 – November 30, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2016 – June 30, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2016 – March 31, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2015 – December 31, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2015 – March 31, 2015	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2015 – March 31, 2015	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2009 – October 31, 2009	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2009 – September 30, 2009	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
June 1, 1997 – June 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

Enforcement actions

December 22, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 29, 2025State Compliance achieved1 linked violation
October 29, 2025State Public Notification requested1 linked violation
October 29, 2025State Violation/Reminder Notice1 linked violation
July 23, 2025State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
July 23, 2025State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
January 23, 2025State Public Notification requested2 linked violations
January 23, 2025State Compliance achieved2 linked violations
January 23, 2025State Violation/Reminder Notice2 linked violations
September 13, 2024State Compliance achieved1 linked violation
July 24, 2024State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
July 24, 2024State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
July 23, 2024State Violation/Reminder Notice1 linked violation
July 22, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 24, 2023State Violation/Reminder Notice1 linked violation
October 24, 2023State Public Notification requested1 linked violation
October 18, 2023State Compliance achieved2 linked violations
October 18, 2023State Violation/Reminder Notice2 linked violations
October 18, 2023State Public Notification requested2 linked violations
October 10, 2023State Compliance achieved1 linked violation
October 10, 2023State Compliance achieved1 linked violation
September 26, 2023State Public Notification requested1 linked violation
September 26, 2023State Violation/Reminder Notice1 linked violation
July 31, 2023State Compliance achieved1 linked violation
July 13, 2023State Violation/Reminder Notice1 linked violation
July 13, 2023State Public Notification requested1 linked violation
October 21, 2022State Compliance achieved4 linked violations
October 17, 2022State Compliance achieved1 linked violation
October 17, 2022State Violation/Reminder Notice1 linked violation
September 16, 2022State Compliance achieved1 linked violation
August 8, 2022State Compliance achieved2 linked violations
August 8, 2022State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 8, 2022State Compliance achieved2 linked violations
July 28, 2022State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
July 28, 2022State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
July 11, 2022State Violation/Reminder Notice1 linked violation
April 4, 2022State Compliance achieved3 linked violations
October 28, 2021State Compliance achieved2 linked violations
October 28, 2021State Compliance achieved6 linked violations
October 22, 2021State Public Notification requested1 linked violation
October 20, 2021State Violation/Reminder Notice4 linked violations
October 20, 2021State Public Notification requested4 linked violations
September 13, 2021State Compliance achieved33 linked violations
August 23, 2021State Violation/Reminder Notice2 linked violations
July 16, 2021State Public Notification requested1 linked violation
July 12, 2021State Public Notification requested4 linked violations
May 18, 2021State Public Notification requested3 linked violations
April 2, 2021State Violation/Reminder Notice3 linked violations
February 24, 2021State Compliance achieved1 linked violation
February 24, 2021State Compliance achieved1 linked violation
February 17, 2021State Violation/Reminder Notice1 linked violation
February 17, 2021State Public Notification requested3 linked violations
February 17, 2021State Public Notification requested1 linked violation
December 18, 2020State Public Notification requested1 linked violation
December 18, 2020State Violation/Reminder Notice1 linked violation
October 19, 2020State Public Notification requested2 linked violations
October 19, 2020State Violation/Reminder Notice2 linked violations
August 24, 2020State Compliance achieved1 linked violation
August 24, 2020State Compliance achieved1 linked violation
August 24, 2020State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 21, 2020State Public Notification requested1 linked violation
August 21, 2020State Violation/Reminder Notice1 linked violation
July 21, 2020State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
July 21, 2020State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
July 17, 2020State Violation/Reminder Notice1 linked violation
July 17, 2020State Public Notification requested1 linked violation
January 15, 2020State Violation/Reminder Notice1 linked violation
January 15, 2020State Public Notification requested1 linked violation
January 13, 2020State Compliance achieved1 linked violation
November 28, 2018State Compliance achieved1 linked violation
November 16, 2018State Violation/Reminder Notice1 linked violation
November 16, 2018State Public Notification requested1 linked violation
September 19, 2018State Compliance achieved1 linked violation
September 14, 2018State Violation/Reminder Notice1 linked violation
September 14, 2018State Public Notification requested1 linked violation
July 27, 2018State Compliance achieved1 linked violation
July 26, 2018State Public Notification received1 linked violation
July 17, 2018State Violation/Reminder Notice1 linked violation
June 20, 2018State Compliance achieved1 linked violation
March 15, 2018State Public Notification requested1 linked violation
March 15, 2018State Violation/Reminder Notice1 linked violation
March 12, 2018State Compliance achieved1 linked violation
November 8, 2017State Compliance achieved2 linked violations
October 23, 2017State Public Notification requested1 linked violation
October 23, 2017State Violation/Reminder Notice1 linked violation
October 19, 2017State Public Notification requested2 linked violations
October 19, 2017State Violation/Reminder Notice2 linked violations
July 27, 2017State Compliance achieved1 linked violation
July 20, 2017State Violation/Reminder Notice1 linked violation
April 20, 2017State Public Notification requested2 linked violations
April 20, 2017State Violation/Reminder Notice2 linked violations
April 17, 2017State Compliance achieved2 linked violations
February 6, 2017State Public Notification received1 linked violation
December 15, 2016State Violation/Reminder Notice4 linked violations
December 15, 2016State Public Notification requested3 linked violations
December 12, 2016State Compliance achieved1 linked violation
August 29, 2016State Compliance achieved1 linked violation
August 29, 2016State Compliance achieved1 linked violation
August 29, 2016State Compliance achieved1 linked violation
May 23, 2016State Violation/Reminder Notice1 linked violation
May 23, 2016State Public Notification requested1 linked violation
February 11, 2016State Violation/Reminder Notice1 linked violation
February 11, 2016State Public Notification requested1 linked violation
November 9, 2015State Violation/Reminder Notice1 linked violation
November 9, 2015State Public Notification requested1 linked violation
May 11, 2015State Compliance achieved2 linked violations
April 17, 2015State Public Notification requested2 linked violations
April 17, 2015State Violation/Reminder Notice2 linked violations
October 21, 2010State Compliance achieved2 linked violations
May 14, 2010State Compliance achieved2 linked violations
March 9, 2010State Public Notification received2 linked violations
January 24, 2010State Violation/Reminder Notice2 linked violations
January 24, 2010State Public Notification requested2 linked violations
October 22, 2009State Public Notification received1 linked violation
October 19, 2009State Public Notification requested1 linked violation
October 19, 2009State Violation/Reminder Notice1 linked violation
May 15, 2009State Compliance achieved2 linked violations
January 8, 2009State Compliance achieved3 linked violations
January 29, 1998State Violation/Reminder Notice58 linked violations
August 28, 1997State Violation/Reminder Notice3 linked violations

Contact

WASHINGTON, CHRISTINA

406-746-3461

NASHUA, MT 59248