BARNETT WATER USERS SYSTEM

Montana — Community Water System — PWSID: MT0003183

System Information

PWSID	MT0003183
System Name	BARNETT WATER USERS SYSTEM
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Private
EPA Region	08
Serves School	No
Wholesaler	No
First Reported	Jul 1, 1987
Last Reported	Jan 5, 2026

Location & Contact

State	Montana
City	HELENA
ZIP Code	59602
Address	5925 DELRAY DRIVE
Organization	SENNETT, MIKE R
Phone	406-461-5718

Population & Service

Population Served	70
Service Connections	29

Drinking Water Violations (202)

This water system has 202 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	Mar 10, 2025	Lead and Copper Rule
Dec 30, 2024	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Mar 10, 2025	Lead and Copper Rule
Jul 1, 2023	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 11, 2023	Consumer Confidence Rule
Jul 1, 2023	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 11, 2023	Consumer Confidence Rule
Oct 27, 2022	—	E. COLI	MR	No	No	—	—	—	Resolved	Nov 21, 2022	Ground Water Rule
Oct 27, 2022	—	E. COLI	MR	No	No	—	—	—	Resolved	Nov 21, 2022	Ground Water Rule
Oct 27, 2022	—	E. COLI	MR	No	No	—	—	—	Resolved	Nov 21, 2022	Ground Water Rule
Oct 27, 2022	—	E. COLI	MR	No	No	—	—	—	Resolved	Nov 21, 2022	Ground Water 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
Oct 1, 2014	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 23, 2014	Lead and Copper Rule
Oct 1, 2014	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 23, 2014	Lead and Copper Rule
Oct 1, 2014	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 23, 2014	Lead and Copper Rule
Jan 1, 2014	Dec 31, 2016	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Jan 1, 2014	Dec 31, 2016	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 2016	Inorganic Chemicals
Nov 1, 2013	Nov 30, 2013	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2013	Total Coliform Rule
Nov 1, 2013	Nov 30, 2013	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2013	Total Coliform Rule
Nov 1, 2013	Nov 30, 2013	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2013	Total Coliform Rule
Nov 1, 2013	Nov 30, 2013	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2013	Total Coliform Rule
Dec 1, 2012	Dec 31, 2012	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 2012	Total Coliform Rule
Dec 1, 2012	Dec 31, 2012	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 2012	Total Coliform Rule
Jan 1, 2011	Dec 31, 2013	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Dec 31, 2013	Arsenic 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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