CORVALLIS, MT · Ravalli County

BIG SKY DRINKING WATER INC Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of March 3, 2004. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in Ravalli County, MT.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Montana’s official records. Always confirm current status with Montana before making decisions based on this information.

System facts

System ID (PWSID): MT0003371
System type: Community Water System
Population served: 3,025
Service connections: 3
Ownership: privately owned
Water source: groundwater (wells)

BIG SKY DRINKING WATER INC is one of 123 community water systems in Montana in the 501 to 3,300 people size category, formerly serving 3,025 people from groundwater.

EPA's federal records list this system as inactive in 2004; the record below is historical.

As of August 1, 2026, its federal record holds 26 entries between 1996 and 2003, all of which EPA lists as closed. Nothing has been added since 2003.

Of the 26, 25 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves synthetic organic chemicals, inorganic chemicals, and volatile organic chemicals.

Violation history

Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2003 – December 10, 2003
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2002 – October 31, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2002 – September 30, 2002
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2002 – March 3, 2004
Resolved
Monitoring, Regular
—
Nickel
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2002 – December 31, 2002
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 1999 – August 31, 1999
Archived
Monitoring, Regular
—
Nickel
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
2,4-D
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1999 – December 31, 1999
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Dalapon
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
2,4-D
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Nickel
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 1996 – December 31, 1998
Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2003 – December 10, 2003	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2002 – October 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2002 – September 30, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2002 – March 3, 2004	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Nickel	—	Resolved
January 1, 2002 – December 31, 2002	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Beryllium, Total	—	Resolved
August 1, 1999 – August 31, 1999	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 1999 – December 31, 2001	Monitoring, Regular	Nickel	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	2,4-D	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 1999 – December 31, 1999	Monitoring, Regular	Nitrate	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Dalapon	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	2,4-D	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Nickel	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Beryllium, Total	—	Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

January 12, 2005State Compliance achieved13 linked violations
January 4, 2005State Public Notification requested2 linked violations
January 4, 2005State Violation/Reminder Notice2 linked violations
September 20, 2004State Compliance achieved1 linked violation
February 23, 2004State Compliance achieved2 linked violations
February 23, 2004State Public Notification requested2 linked violations
December 10, 2003State Compliance achieved1 linked violation
October 12, 2003State Violation/Reminder Notice1 linked violation
May 22, 2003State Compliance achieved43 linked violations
November 22, 2002State Public Notification requested1 linked violation
October 24, 2002State Public Notification requested1 linked violation
July 21, 2002State Violation/Reminder Notice2 linked violations
July 12, 2002State Public Notification requested6 linked violations
July 5, 2002State Public Notification requested9 linked violations
June 29, 2002State Public Notification requested24 linked violations
June 29, 2002State Violation/Reminder Notice23 linked violations
June 28, 2000State Compliance achieved5 linked violations
September 14, 1999State Violation/Reminder Notice2 linked violations
August 27, 1999State Violation/Reminder Notice2 linked violations
August 24, 1999State Violation/Reminder Notice2 linked violations

Last known contact on file (system is inactive)

Not on record

406-961-4450

CORVALLIS, MT 59828