HARLEM, 08

FORT BELKNAP AGENCY WATER SYSTEM 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 EPA Region 8’s official records. Always confirm current status with EPA Region 8 before making decisions based on this information.

System facts

System ID (PWSID): 083090041
System type: Community Water System
Population served: 2,600
Service connections: 461
Ownership: Native American tribal
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2025 – September 30, 2025
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
April 1, 2025 – June 30, 2025
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
October 1, 2024 – December 31, 2024
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2023 – December 31, 2023
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
January 1, 2021 – March 31, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2020 – December 31, 2020
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2020 – September 30, 2020
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 2020 – April 30, 2020
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2020 – December 31, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2020 – March 31, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2019 – December 31, 2019
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2019 – September 30, 2019
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2019 – September 30, 2019
Archived
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2019 – September 30, 2019
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
April 1, 2019 – June 30, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2019 – June 30, 2019
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2018 – September 30, 2018
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2018 – September 30, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2017 – June 30, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2017 – March 31, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2016 – December 31, 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
October 1, 2015 – December 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2015 – September 30, 2015
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
October 1, 2014 – December 31, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2014 – September 30, 2014
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
October 1, 2012 – December 31, 2012
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2012 – December 31, 2012
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2012 – June 30, 2012
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2011 – March 31, 2011
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2010 – December 31, 2010
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2010 – September 30, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 2010 – May 31, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2010 – February 28, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 2009 – July 31, 2009
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2009 – July 31, 2009
Archived
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2009 – June 30, 2009
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2009 – January 31, 2009
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2008 – February 29, 2008
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Styrene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2008 – December 31, 2008
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2006 – September 30, 2006
Archived
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2006 – June 30, 2006
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2005 – May 31, 2005
Archived
Monitoring, Regular
—
Fluoride
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Selenium
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Nitrate
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Mercury
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Arsenic
June 24, 1979 – June 23, 1980
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2025 – September 30, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2025 – June 30, 2025	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Archived
October 1, 2024 – December 31, 2024	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Archived
October 1, 2023 – December 31, 2023	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2021 – March 31, 2021	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
October 1, 2020 – December 31, 2020	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2020 – September 30, 2020	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
April 1, 2020 – April 30, 2020	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Asbestos	—	Resolved
January 1, 2020 – March 31, 2020	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2019 – December 31, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2019 – September 30, 2019	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
July 1, 2019 – September 30, 2019	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
July 1, 2019 – September 30, 2019	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
April 1, 2019 – June 30, 2019	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
April 1, 2019 – June 30, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2018 – September 30, 2018	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
July 1, 2018 – September 30, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2017 – June 30, 2017	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2017 – March 31, 2017	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2016 – December 31, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2016 – June 30, 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
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2014 – December 31, 2014	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2012 – December 31, 2012	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Archived
October 1, 2012 – December 31, 2012	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
April 1, 2012 – June 30, 2012	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
January 1, 2011 – March 31, 2011	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2010 – December 31, 2010	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2010 – September 30, 2010	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
May 1, 2010 – May 31, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
February 1, 2010 – February 28, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2009 – July 31, 2009	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
July 1, 2009 – July 31, 2009	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
April 1, 2009 – June 30, 2009	Monitoring and Reporting (DBP)	TTHM	—	Archived
January 1, 2009 – January 31, 2009	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
February 1, 2008 – February 29, 2008	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Styrene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Vinyl chloride	—	Resolved
July 1, 2006 – September 30, 2006	Monitoring and Reporting (DBP)	TTHM	—	Archived
April 1, 2006 – June 30, 2006	Monitoring and Reporting (DBP)	TTHM	—	Archived
May 1, 2005 – May 31, 2005	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
June 24, 1979 – June 23, 1980	Monitoring, Regular	Fluoride	—	Archived
June 24, 1979 – June 23, 1980	Monitoring, Regular	Selenium	—	Archived
June 24, 1979 – June 23, 1980	Monitoring, Regular	Nitrate	—	Archived
June 24, 1979 – June 23, 1980	Monitoring, Regular	Mercury	—	Archived
June 24, 1979 – June 23, 1980	Monitoring, Regular	Arsenic	—	Archived

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

Enforcement actions

January 29, 2021Federal Final Administrative Order issued14 linked violations
December 2, 2013Federal Consent Decree/Judgement60 linked violations
February 24, 2012State Compliance achieved63 linked violations
June 28, 2010State Compliance achieved51 linked violations
October 21, 2009State Compliance achieved12 linked violations
August 3, 2009Federal Consent Decree/Judgement18 linked violations
July 11, 2008Federal SDWA Section 1431 (Emergency) Order38 linked violations
January 31, 2008State Compliance achieved8 linked violations
September 6, 2007Federal Final Administrative Order issued6 linked violations
September 6, 2007Federal Final Administrative Order issued178 linked violations

Contact

RAMONE, KASEY

406-353-8313

HARLEM, MT 59526