LITTLE BIGHORN BATTLEFIELD NM

Montana — Non-Transient Non-Community — PWSID: MT0000191

System Information

PWSID	MT0000191
System Name	LITTLE BIGHORN BATTLEFIELD NM
System Type	Non-Transient Non-Community
Water Source	Ground Water
Activity Status	Active
Owner Type	Federal
EPA Region	08
Serves School	No
Wholesaler	No
First Reported	Feb 13, 1979
Last Reported	Jan 5, 2026

Location & Contact

State	Montana
City	CROW AGENCY
ZIP Code	59022
Address	PO BOX 39
Organization	PEACOCK, KELLY
Phone	406-679-0384

Population & Service

Population Served	2,020
Service Connections	11

Drinking Water Violations (42)

This water system has 42 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Contaminant	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Jan 1, 2022	Dec 31, 2022	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2022	Nitrate Rule
Jan 1, 2022	Dec 31, 2022	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2022	Nitrate Rule
Jan 1, 2022	Dec 31, 2022	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2022	Nitrate Rule
Jan 1, 2022	Dec 31, 2022	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2022	Nitrate Rule
Jan 1, 2021	Jul 31, 2021	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Jul 31, 2021	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021	Jul 31, 2021	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Jul 31, 2021	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021	Jul 31, 2021	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Jul 31, 2021	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021	Jul 31, 2021	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Jul 31, 2021	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021	Jul 31, 2021	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Jul 31, 2021	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021	Jul 31, 2021	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Jul 31, 2021	Stage 2 Disinfectants and Disinfection Byproducts Rule
Dec 30, 2020	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jan 27, 2021	Lead and Copper Rule
Dec 30, 2020	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jan 27, 2021	Lead and Copper Rule
Oct 1, 2019	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Aug 25, 2020	Lead and Copper Rule
Oct 1, 2019	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Aug 25, 2020	Lead and Copper Rule
Oct 1, 2019	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Aug 25, 2020	Lead and Copper Rule
Sep 1, 2018	Aug 31, 2019	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Aug 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2018	Aug 31, 2019	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Aug 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2018	Aug 31, 2019	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Aug 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2018	Aug 31, 2019	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Aug 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2018	Aug 31, 2019	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Aug 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2018	Aug 31, 2019	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Aug 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 10, 2014	Lead and Copper Rule
Jan 1, 2014	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 10, 2014	Lead and Copper Rule
Jan 1, 2012	Dec 31, 2012	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2012	Nitrate Rule
Jan 1, 2012	Dec 31, 2012	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2012	Nitrate Rule
Jan 1, 2012	Dec 31, 2012	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2012	Nitrate Rule
Jan 1, 2012	Dec 31, 2012	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2012	Nitrate Rule
Nov 1, 2011	Nov 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2011	Total Coliform Rule
Nov 1, 2011	Nov 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2011	Total Coliform Rule
Nov 1, 2011	Nov 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2011	Total Coliform Rule
Nov 1, 2011	Nov 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2011	Total Coliform Rule
Jan 1, 2011	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 15, 2011	Lead and Copper Rule
Jan 1, 2011	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 15, 2011	Lead and Copper Rule
Jan 1, 2011	Dec 31, 2013	Asbestos	MR	No	Yes	—	7 MFL	—	Archived	Dec 31, 2013	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2013	Asbestos	MR	No	Yes	—	7 MFL	—	Archived	Dec 31, 2013	Inorganic Chemicals
Oct 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 18, 2007	Lead and Copper Rule
Oct 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 18, 2007	Lead and Copper Rule
Oct 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 18, 2007	Lead and Copper Rule
Apr 1, 1999	Apr 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 1999	Total Coliform Rule
Apr 1, 1999	Apr 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 1999	Total Coliform Rule
Apr 1, 1999	Apr 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 1999	Total Coliform Rule
Jan 1, 1996	Dec 31, 1998	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 1998	Inorganic Chemicals

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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