YELLOWTAIL DAM GC SYSTEM

Montana — Community Water System — PWSID: MT0002514

System Information

PWSID	MT0002514
System Name	YELLOWTAIL DAM GC SYSTEM
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Federal
EPA Region	08
Serves School	No
Wholesaler	No
First Reported	Jan 28, 1982
Last Reported	Jan 5, 2026

Location & Contact

State	Montana
City	YELLOWTAIL
ZIP Code	59035
Address	PO BOX 7551
Organization	CURTIS, CHRIS
Phone	406-666-3201

Population & Service

Population Served	125
Service Connections	50

Drinking Water Violations (211)

This water system has 211 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
Dec 30, 2024	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 12, 2025	Lead and Copper Rule
Dec 30, 2024	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 12, 2025	Lead and Copper Rule
Jul 1, 2023	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 10, 2023	Consumer Confidence Rule
Jul 1, 2023	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 10, 2023	Consumer Confidence Rule
Jan 1, 2017	Dec 31, 2017	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2017	Nitrate Rule
Jan 1, 2017	Dec 31, 2017	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2017	Nitrate Rule
Jan 1, 2017	Dec 31, 2017	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2017	Nitrate Rule
Jan 1, 2017	Dec 31, 2017	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2017	Nitrate Rule
Dec 30, 2015	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 1, 2016	Lead and Copper Rule
Dec 30, 2015	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 1, 2016	Lead and Copper Rule
Jan 1, 2013	Dec 31, 2013	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2013	Nitrate Rule
Jan 1, 2013	Dec 31, 2013	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2013	Nitrate Rule
Jan 1, 2013	Dec 31, 2013	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2013	Nitrate Rule
Jan 1, 2013	Dec 31, 2013	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2013	Nitrate Rule
Oct 1, 2012	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Feb 4, 2014	Consumer Confidence Rule
Oct 1, 2012	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Feb 4, 2014	Consumer Confidence Rule
Jul 1, 2012	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Feb 4, 2014	Consumer Confidence 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
Jan 1, 2010	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 16, 2016	Lead and Copper Rule
Jan 1, 2010	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 16, 2016	Lead and Copper Rule
Jul 1, 2007	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 31, 2008	Consumer Confidence Rule
Jul 1, 2007	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 31, 2008	Consumer Confidence Rule
Jul 1, 2007	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 31, 2008	Consumer Confidence Rule
Jan 1, 2006	Dec 31, 2006	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2006	Nitrate Rule
Oct 1, 2005	Oct 31, 2005	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2005	Total Coliform Rule
Oct 1, 2005	Oct 31, 2005	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2005	Total Coliform Rule
Oct 1, 2005	Oct 31, 2005	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2005	Total Coliform Rule
Jul 1, 2002	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Oct 2, 2003	Consumer Confidence Rule
Jul 1, 2002	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Oct 2, 2003	Consumer Confidence Rule
Jan 1, 2002	Dec 31, 2004	HEXACHLOROBENZENE	MR	No	Yes	—	0.001 mg/L	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Atrazine	MR	No	Yes	—	0.003 mg/L	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Aldicarb	MR	No	Yes	—	—	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Aldicarb	MR	No	Yes	—	—	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Aldicarb	MR	No	Yes	—	—	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Dalapon	MR	No	Yes	—	0.2 mg/L	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Dalapon	MR	No	Yes	—	0.2 mg/L	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Toxaphene	MR	No	Yes	—	0.003 mg/L	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Toxaphene	MR	No	Yes	—	0.003 mg/L	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Toxaphene	MR	No	Yes	—	0.003 mg/L	—	Resolved	Dec 31, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 2004	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.

Browse All Water Systems Water Safety Stats Water Safety Home

Browse All Water Systems Water Systems in Montana