BIG SKY DRINKING WATER INC

Montana — Community Water System — PWSID: MT0003371

System Information

PWSID	MT0003371
System Name	BIG SKY DRINKING WATER INC
System Type	Community Water System
Water Source	Ground Water
Activity Status	Non-Inventory
Owner Type	Private
EPA Region	08
Serves School	No
Wholesaler	No
First Reported	Dec 28, 1988
Last Reported	Jan 5, 2026

Location & Contact

State	Montana
City	CORVALLIS
ZIP Code	59828
Address	BOX 490
Organization	—
Phone	406-961-4450

Population & Service

Population Served	3,025
Service Connections	3

Drinking Water Violations (146)

This water system has 146 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, 2004	Dec 31, 2004	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Mar 3, 2004	Nitrate Rule
Jan 1, 2004	Jan 31, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jan 31, 2004	Total Coliform Rule
Jan 1, 2004	Jan 31, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jan 31, 2004	Total Coliform Rule
Jan 1, 2004	Jan 31, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jan 31, 2004	Total Coliform Rule
Oct 1, 2003	—	Lead and Copper Rule	MR	No	No	—	TT	—	Archived	Mar 3, 2004	Lead and Copper Rule
Oct 1, 2003	—	Lead and Copper Rule	MR	No	No	—	TT	—	Archived	Mar 3, 2004	Lead and Copper Rule
Jul 1, 2003	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Dec 10, 2003	Consumer Confidence Rule
Jul 1, 2003	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Dec 10, 2003	Consumer Confidence Rule
Oct 1, 2002	Oct 31, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2002	Total Coliform Rule
Oct 1, 2002	Oct 31, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2002	Total Coliform Rule
Oct 1, 2002	Oct 31, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2002	Total Coliform Rule
Sep 1, 2002	Sep 30, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2002	Total Coliform Rule
Sep 1, 2002	Sep 30, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2002	Total Coliform Rule
Sep 1, 2002	Sep 30, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2002	Total Coliform Rule
Jun 1, 2002	Jun 30, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2002	Total Coliform Rule
Jun 1, 2002	Jun 30, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2002	Total Coliform Rule
Jun 1, 2002	Jun 30, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2002	Total Coliform Rule
Jan 1, 2002	Dec 31, 2002	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2002	Nitrate Rule
Jan 1, 2002	Dec 31, 2002	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2002	Nitrate Rule
Jan 1, 2002	Dec 31, 2002	Nitrate-Nitrite	MR	No	Yes	—	—	—	Resolved	Dec 31, 2002	Nitrate Rule
Jan 1, 2002	Dec 31, 2004	Picloram	MR	No	Yes	—	0.5 mg/L	—	Resolved	Mar 3, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	2,4,5-TP	MR	No	Yes	—	0.05 mg/L	—	Resolved	Mar 3, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Dalapon	MR	No	Yes	—	0.2 mg/L	—	Resolved	Mar 3, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Dinoseb	MR	No	Yes	—	0.007 mg/L	—	Resolved	Mar 3, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Mar 3, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Mar 3, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Mar 3, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Nickel	MR	No	Yes	—	—	—	Resolved	Mar 3, 2004	Inorganic Chemicals
Jan 1, 2002	Dec 31, 2004	Pentachlorophenol	MR	No	Yes	—	0.001 mg/L	—	Resolved	Mar 3, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	2,4-D	MR	No	Yes	—	0.07 mg/L	—	Resolved	Mar 3, 2004	Synthetic Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Mar 3, 2004	Arsenic Rule
Oct 1, 2001	—	Lead and Copper Rule	MR	No	No	—	TT	—	Archived	Mar 3, 2004	Lead and Copper Rule
Aug 1, 1999	Aug 31, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Aug 31, 1999	Total Coliform Rule
Jun 1, 1999	Jun 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Jun 30, 1999	Total Coliform Rule
May 1, 1999	May 31, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	May 31, 1999	Total Coliform Rule
Apr 1, 1999	Apr 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Apr 30, 1999	Total Coliform Rule
Apr 1, 1999	Apr 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Apr 30, 1999	Total Coliform Rule
Jan 1, 1999	Dec 31, 1999	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1999	Nitrate Rule
Jan 1, 1999	Dec 31, 2001	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 2001	Inorganic Chemicals
Jan 1, 1999	Dec 31, 2001	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 2001	Inorganic Chemicals
Jan 1, 1999	Dec 31, 2001	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 2001	Inorganic Chemicals
Jan 1, 1999	Dec 31, 2001	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 2001	Inorganic Chemicals
Jan 1, 1999	Dec 31, 2001	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 2001	Inorganic Chemicals
Jan 1, 1999	Dec 31, 1999	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1999	Nitrate Rule
Jan 1, 1999	Dec 31, 2001	Dalapon	MR	No	Yes	—	0.2 mg/L	—	Resolved	Dec 31, 2001	Synthetic Organic Chemicals
Jan 1, 1999	Dec 31, 2001	Xylenes, Total	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2001	Volatile Organic Chemicals
Jan 1, 1999	Dec 31, 2001	Dalapon	MR	No	Yes	—	0.2 mg/L	—	Resolved	Dec 31, 2001	Synthetic Organic Chemicals
Jan 1, 1999	Dec 31, 2001	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 2001	Inorganic Chemicals
Jan 1, 1999	Dec 31, 2001	Dalapon	MR	No	Yes	—	0.2 mg/L	—	Resolved	Dec 31, 2001	Synthetic Organic Chemicals
Jan 1, 1999	Dec 31, 1999	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1999	Nitrate 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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