THREE FORKS KOA

Montana — Transient Non-Community — PWSID: MT0000759

System Information

PWSID	MT0000759
System Name	THREE FORKS KOA
System Type	Transient Non-Community
Water Source	Ground Water
Activity Status	Active
Owner Type	Private
EPA Region	08
Serves School	No
Wholesaler	No
First Reported	Mar 5, 1980
Last Reported	Jan 5, 2026

Location & Contact

State	Montana
City	THREE FORKS
ZIP Code	59752
Address	15 KOA ROAD
Organization	BROOKE, PETER
Phone	406-285-3611

Population & Service

Population Served	202
Service Connections	71

Drinking Water Violations (109)

This water system has 109 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
Sep 9, 2025	—	Revised Total Coliform Rule	TT	Yes	No	—	—	—	Resolved	Oct 16, 2025	Revised Total Coliform Rule
Sep 9, 2025	—	Revised Total Coliform Rule	TT	Yes	No	—	—	—	Resolved	Oct 16, 2025	Revised Total Coliform Rule
Sep 9, 2025	—	Revised Total Coliform Rule	TT	Yes	No	—	—	—	Resolved	Oct 16, 2025	Revised Total Coliform Rule
Jan 1, 2023	Dec 31, 2023	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2023	Nitrate Rule
Jan 1, 2023	Dec 31, 2023	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2023	Nitrate Rule
Jan 1, 2023	Dec 31, 2023	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2023	Nitrate Rule
Jan 1, 2021	Dec 31, 2021	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2021	Nitrate Rule
Jan 1, 2021	Dec 31, 2021	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2021	Nitrate Rule
Jan 1, 2021	Dec 31, 2021	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2021	Nitrate Rule
May 1, 2019	May 31, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	May 31, 2019	Revised Total Coliform Rule
May 1, 2019	May 31, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	May 31, 2019	Revised Total Coliform Rule
May 1, 2019	May 31, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	May 31, 2019	Revised Total Coliform Rule
May 16, 2018	—	Revised Total Coliform Rule	TT	Yes	No	—	—	—	Resolved	Sep 14, 2018	Revised Total Coliform Rule
May 16, 2018	—	Revised Total Coliform Rule	TT	Yes	No	—	—	—	Resolved	Sep 14, 2018	Revised Total Coliform Rule
May 16, 2018	—	Revised Total Coliform Rule	TT	Yes	No	—	—	—	Resolved	Sep 14, 2018	Revised Total Coliform Rule
May 16, 2016	—	Revised Total Coliform Rule	TT	Yes	No	—	—	—	Resolved	Aug 30, 2016	Revised Total Coliform Rule
May 16, 2016	—	Revised Total Coliform Rule	TT	Yes	No	—	—	—	Resolved	Aug 30, 2016	Revised Total Coliform Rule
May 16, 2016	—	Revised Total Coliform Rule	TT	Yes	No	—	—	—	Resolved	Aug 30, 2016	Revised Total Coliform Rule
Jun 10, 2014	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Jun 9, 2014	Ground Water Rule
Jun 10, 2014	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Jun 9, 2014	Ground Water Rule
Jun 10, 2014	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Jun 9, 2014	Ground Water Rule
Jun 1, 2014	Jun 30, 2014	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2014	Total Coliform Rule
Jun 1, 2014	Jun 30, 2014	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2014	Total Coliform Rule
Jun 1, 2014	Jun 30, 2014	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2014	Total Coliform Rule
Jun 1, 2014	Jun 30, 2014	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2014	Total Coliform Rule
May 1, 2014	May 31, 2014	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2014	Total Coliform Rule
May 1, 2014	May 31, 2014	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2014	Total Coliform Rule
May 1, 2014	May 31, 2014	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2014	Total Coliform Rule
Oct 1, 2011	Oct 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2011	Total Coliform Rule
Oct 1, 2011	Oct 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2011	Total Coliform Rule
Oct 1, 2011	Oct 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2011	Total Coliform Rule
Aug 1, 2011	Aug 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Aug 31, 2011	Total Coliform Rule
Aug 1, 2011	Aug 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Aug 31, 2011	Total Coliform Rule
Aug 1, 2011	Aug 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Aug 31, 2011	Total Coliform Rule
Jun 1, 2011	Jun 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2011	Total Coliform Rule
Jun 1, 2011	Jun 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2011	Total Coliform Rule
Jun 1, 2011	Jun 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2011	Total Coliform Rule
Apr 1, 2011	Apr 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 2011	Total Coliform Rule
Apr 1, 2011	Apr 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 2011	Total Coliform Rule
Apr 1, 2011	Apr 30, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 2011	Total Coliform Rule
Oct 1, 2010	Dec 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 2010	Total Coliform Rule
Oct 1, 2010	Dec 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 2010	Total Coliform Rule
Oct 1, 2010	Dec 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2009	Sep 30, 2009	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2009	Total Coliform Rule
Jul 1, 2009	Sep 30, 2009	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2009	Total Coliform Rule
Jul 1, 2009	Sep 30, 2009	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2009	Total Coliform Rule
Oct 1, 2007	Dec 31, 2007	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 2007	Total Coliform Rule

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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