CROW AGENCY, 08

CROW 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): 083090011
System type: Community Water System
Population served: 2,057
Service connections: 435
Ownership: federal government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2023 – June 30, 2023
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
April 1, 2023 – June 30, 2023
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
March 1, 2023 – March 31, 2023
Resolved
Monitoring, Regular
—
Toluene
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Nickel
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Benzene
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Barium
January 1, 2023 – December 31, 2023
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2020 – September 30, 2020
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
January 1, 2020 – March 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
April 1, 2018 – June 30, 2018
Archived
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
April 1, 2018 – June 30, 2018
Archived
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2018 – March 31, 2018
Archived
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2018 – March 31, 2018
Archived
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2018 – March 31, 2018
Archived
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2018 – March 31, 2018
Archived
Failure To Address Deficiency
Health-based
Long Term 2 Enhanced Surface Water Treatment Rule
April 9, 2017 – March 14, 2018
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2017 – March 31, 2017
Archived
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
September 1, 2016 – September 30, 2016
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
July 1, 2016 – July 31, 2016
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
January 1, 2016 – January 31, 2016
Resolved
Failure To Address Deficiency
Health-based
Long Term 2 Enhanced Surface Water Treatment Rule
March 11, 2015 – November 1, 2016
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2015 – March 31, 2015
Resolved
Failure To Address Deficiency
Health-based
Long Term 2 Enhanced Surface Water Treatment Rule
April 1, 2014 – January 27, 2017
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2013 – August 31, 2013
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2012 – September 30, 2012
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2012 – September 30, 2012
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2012 – September 30, 2012
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2012 – August 31, 2012
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2012 – August 31, 2012
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
August 1, 2012 – August 31, 2012
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
August 1, 2012 – August 31, 2012
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 2012 – July 31, 2012
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2012 – July 31, 2012
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2012 – July 31, 2012
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
July 1, 2012 – July 31, 2012
Resolved
Failure Submit Filter Profile/CPE Report
—
Interim Enhanced Surface Water Treatment Rule
July 1, 2012 – July 31, 2012
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 2012 – July 31, 2012
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2012 – May 31, 2012
Resolved
Failure Submit Filter Profile/CPE Report
—
Interim Enhanced Surface Water Treatment Rule
May 1, 2012 – May 31, 2012
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
May 1, 2012 – May 31, 2012
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2012 – May 31, 2012
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 2012 – May 31, 2012
Resolved
Record Keeping
—
Interim Enhanced Surface Water Treatment Rule
May 1, 2012 – July 23, 2012
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
May 1, 2012 – May 31, 2012
Resolved
Failure Submit Filter Profile/CPE Report
—
Interim Enhanced Surface Water Treatment Rule
May 1, 2012 – May 31, 2012
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 2012 – April 30, 2012
Resolved
Failure Submit Filter Profile/CPE Report
—
Interim Enhanced Surface Water Treatment Rule
April 1, 2012 – April 30, 2012
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
March 1, 2012 – March 31, 2012
Resolved
Failure Submit Filter Profile/CPE Report
—
Interim Enhanced Surface Water Treatment Rule
March 1, 2012 – March 31, 2012
Resolved
Record Keeping
—
Interim Enhanced Surface Water Treatment Rule
March 1, 2012 – July 23, 2012
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2012 – February 29, 2012
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2012 – March 31, 2012
Archived
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
April 1, 2011 – April 30, 2011
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
March 1, 2011 – March 31, 2011
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
February 1, 2011 – February 28, 2011
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
January 1, 2011 – January 31, 2011
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
December 1, 2010 – December 31, 2010
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
November 1, 2010 – November 30, 2010
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
October 1, 2010 – October 31, 2010
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
September 1, 2010 – September 30, 2010
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2010 – August 31, 2010
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
July 1, 2010 – July 31, 2010
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
February 1, 2010 – February 28, 2010
Archived
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
December 1, 2009 – December 31, 2009
Archived
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
October 1, 2009 – October 31, 2009
Resolved
Monitoring, Regular
—
Selenium
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Nitrate
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Fluoride
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Arsenic
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Chromium
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 1, 1976 – May 31, 1980
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
June 1, 1976 – May 31, 1980
Archived

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
June 1, 2023 – June 30, 2023	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
April 1, 2023 – June 30, 2023	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
March 1, 2023 – March 31, 2023	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Toluene	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Nickel	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Benzene	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Barium	—	Resolved
July 1, 2020 – September 30, 2020	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
January 1, 2020 – March 31, 2020	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
April 1, 2018 – June 30, 2018	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
April 1, 2018 – June 30, 2018	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
January 1, 2018 – March 31, 2018	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
January 1, 2018 – March 31, 2018	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
January 1, 2018 – March 31, 2018	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
January 1, 2018 – March 31, 2018	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
April 9, 2017 – March 14, 2018	Failure To Address Deficiency	Long Term 2 Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2017 – March 31, 2017	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
September 1, 2016 – September 30, 2016	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
July 1, 2016 – July 31, 2016	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
January 1, 2016 – January 31, 2016	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
March 11, 2015 – November 1, 2016	Failure To Address Deficiency	Long Term 2 Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2015 – March 31, 2015	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
April 1, 2014 – January 27, 2017	Failure To Address Deficiency	Long Term 2 Enhanced Surface Water Treatment Rule	Health-based	Resolved
August 1, 2013 – August 31, 2013	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2012 – September 30, 2012	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 2012 – September 30, 2012	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2012 – September 30, 2012	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 2012 – August 31, 2012	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 2012 – August 31, 2012	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
August 1, 2012 – August 31, 2012	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
August 1, 2012 – August 31, 2012	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2012 – July 31, 2012	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2012 – July 31, 2012	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2012 – July 31, 2012	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2012 – July 31, 2012	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
July 1, 2012 – July 31, 2012	Failure Submit Filter Profile/CPE Report	Interim Enhanced Surface Water Treatment Rule	—	Resolved
July 1, 2012 – July 31, 2012	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
May 1, 2012 – May 31, 2012	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
May 1, 2012 – May 31, 2012	Failure Submit Filter Profile/CPE Report	Interim Enhanced Surface Water Treatment Rule	—	Resolved
May 1, 2012 – May 31, 2012	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
May 1, 2012 – May 31, 2012	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
May 1, 2012 – May 31, 2012	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
May 1, 2012 – July 23, 2012	Record Keeping	Interim Enhanced Surface Water Treatment Rule	—	Resolved
May 1, 2012 – May 31, 2012	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
May 1, 2012 – May 31, 2012	Failure Submit Filter Profile/CPE Report	Interim Enhanced Surface Water Treatment Rule	—	Resolved
April 1, 2012 – April 30, 2012	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
April 1, 2012 – April 30, 2012	Failure Submit Filter Profile/CPE Report	Interim Enhanced Surface Water Treatment Rule	—	Resolved
March 1, 2012 – March 31, 2012	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
March 1, 2012 – March 31, 2012	Failure Submit Filter Profile/CPE Report	Interim Enhanced Surface Water Treatment Rule	—	Resolved
March 1, 2012 – July 23, 2012	Record Keeping	Interim Enhanced Surface Water Treatment Rule	—	Resolved
February 1, 2012 – February 29, 2012	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2012 – March 31, 2012	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
April 1, 2011 – April 30, 2011	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
March 1, 2011 – March 31, 2011	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
February 1, 2011 – February 28, 2011	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
January 1, 2011 – January 31, 2011	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
December 1, 2010 – December 31, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
November 1, 2010 – November 30, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
October 1, 2010 – October 31, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
September 1, 2010 – September 30, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
August 1, 2010 – August 31, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
July 1, 2010 – July 31, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
February 1, 2010 – February 28, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Archived
December 1, 2009 – December 31, 2009	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Archived
October 1, 2009 – October 31, 2009	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
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	Fluoride	—	Archived
June 24, 1979 – June 23, 1980	Monitoring, Regular	Arsenic	—	Archived
June 24, 1979 – June 23, 1980	Monitoring, Regular	Chromium	—	Archived
June 1, 1976 – May 31, 1980	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
June 1, 1976 – May 31, 1980	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived

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

Enforcement actions

August 29, 2011Federal Final Administrative Order issuedgeneral compliance action — not tied to a specific violation on record

Contact

STOPS, JR., MARVIN (WES)

406-697-4765

CROW AGENCY, MT 59022