MISSOULA, MT · Missoula County

SUNSET WEST RSID Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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): MT0001857
System type: Community Water System
Population served: 105
Service connections: 42
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2014 – August 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2014 – July 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 2014 – March 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2013 – October 31, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2013 – August 31, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 2011 – December 31, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2011 – October 31, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2008 – September 30, 2008
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2008 – August 31, 2008
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2007 – December 24, 2007
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2004 – August 31, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2002 – September 30, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2001 – February 28, 2001
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1997 – January 31, 1997
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
November 1, 1995 – November 30, 1995
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1993 – December 31, 1993
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
July 1, 1992 – July 31, 1992
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
August 1, 2014 – August 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2014 – July 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
March 1, 2014 – March 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2013 – October 31, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2013 – August 31, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
December 1, 2011 – December 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2011 – October 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2008 – August 31, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2007 – December 24, 2007	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
August 1, 2004 – August 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2002 – September 30, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
February 1, 2001 – February 28, 2001	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 1997 – January 31, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 1995 – November 30, 1995	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 1993 – December 31, 1993	Monitoring, Regular	Nitrate	—	Resolved
July 1, 1992 – July 31, 1992	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

September 11, 2014State Compliance achieved1 linked violation
September 11, 2014State Compliance achieved1 linked violation
August 27, 2014State Public Notification received1 linked violation
August 27, 2014State Public Notification requested1 linked violation
August 27, 2014State Violation/Reminder Notice1 linked violation
August 27, 2014State Violation/Reminder Notice1 linked violation
July 11, 2014State Violation/Reminder Notice1 linked violation
July 11, 2014State Public Notification received1 linked violation
July 11, 2014State Public Notification requested1 linked violation
July 11, 2014State Violation/Reminder Notice1 linked violation
April 14, 2014State Compliance achieved1 linked violation
March 24, 2014State Public Notification received1 linked violation
March 21, 2014State Violation/Reminder Notice1 linked violation
March 21, 2014State Public Notification requested1 linked violation
March 21, 2014State Violation/Reminder Notice1 linked violation
November 12, 2013State Compliance achieved1 linked violation
October 11, 2013State Public Notification requested1 linked violation
October 11, 2013State Public Notification received1 linked violation
October 11, 2013State Violation/Reminder Notice1 linked violation
October 11, 2013State Violation/Reminder Notice1 linked violation
September 9, 2013State Compliance achieved1 linked violation
August 13, 2013State Public Notification received1 linked violation
August 9, 2013State Public Notification requested1 linked violation
August 9, 2013State Violation/Reminder Notice1 linked violation
August 9, 2013State Violation/Reminder Notice1 linked violation
January 17, 2012State Compliance achieved1 linked violation
January 17, 2012State Compliance achieved1 linked violation
December 18, 2011State Public Notification received1 linked violation
December 14, 2011State Violation/Reminder Notice1 linked violation
December 14, 2011State Public Notification requested1 linked violation
December 14, 2011State Violation/Reminder Notice1 linked violation
October 11, 2011State Public Notification received1 linked violation
October 7, 2011State Public Notification requested1 linked violation
October 7, 2011State Violation/Reminder Notice1 linked violation
October 7, 2011State Violation/Reminder Notice1 linked violation
May 29, 2009State Compliance achieved1 linked violation
May 29, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved2 linked violations
May 15, 2009State Compliance achieved2 linked violations
May 15, 2009State Compliance achieved2 linked violations
May 15, 2009State Compliance achieved2 linked violations
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved2 linked violations
May 15, 2009State Compliance achieved2 linked violations
September 16, 2008State Public Notification received1 linked violation
September 10, 2008State Violation/Reminder Notice2 linked violations
September 10, 2008State Violation/Reminder Notice1 linked violation
August 22, 2008State Public Notification received1 linked violation
August 18, 2008State Violation/Reminder Notice1 linked violation
August 18, 2008State Public Notification requested1 linked violation
August 18, 2008State Violation/Reminder Notice1 linked violation
December 24, 2007State Compliance achieved1 linked violation
August 14, 2007State Public Notification received1 linked violation
July 31, 2007State Public Notification requested1 linked violation
July 31, 2007State Violation/Reminder Notice1 linked violation
April 14, 2005State Compliance achieved2 linked violations
September 22, 2004State Public Notification received1 linked violation
September 1, 2004State Violation/Reminder Notice1 linked violation
September 1, 2004State Violation/Reminder Notice1 linked violation
September 1, 2004State Public Notification requested1 linked violation
December 20, 2002State Compliance achieved2 linked violations
October 2, 2002State Violation/Reminder Notice3 linked violations
June 12, 2002State Compliance achieved1 linked violation
May 24, 2001State Public Notification requested1 linked violation
May 24, 2001State Violation/Reminder Notice1 linked violation

Contact

OCONNOR, BRENT

406-258-4832

MISSOULA, MT 59808