MISSOULA, MT · Ravalli County

MOUNTAIN SHADOWS ESTATES STEVENSVILLE Water System

Current status

1 open health-based violation on record as of July 4, 2026. See the violation history below for contaminant and status details.

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): MT0002132
System type: Community Water System
Population served: 55
Service connections: 22
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Treatment Technique, Level 1 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
December 13, 2025
Unaddressed
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Benzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2002 – December 31, 2004
Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
December 13, 2025	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Unaddressed
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Benzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	CHLOROBENZENE	—	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

January 7, 2026State Public Notification requested2 linked violations
January 7, 2026State Violation/Reminder Notice1 linked violation
December 2, 2022State Public Notification received1 linked violation
November 4, 2022State Public Notification requested1 linked violation
September 20, 2022State Compliance achieved1 linked violation
July 24, 2017State Compliance achieved2 linked violations
July 20, 2017State Violation/Reminder Notice2 linked violations
March 15, 2014State Public Notification received22 linked violations
February 19, 2014State Compliance achieved21 linked violations
January 24, 2014State Violation/Reminder Notice22 linked violations
January 24, 2014State Public Notification requested22 linked violations
January 18, 2013State Violation/Reminder Notice2 linked violations
September 17, 2012State Public Notification requested1 linked violation
September 17, 2012State Violation/Reminder Notice2 linked violations
June 21, 2012State Compliance achieved1 linked violation
December 16, 2011State Compliance achieved1 linked violation
December 14, 2011State Public Notification requested2 linked violations
November 3, 2011State Compliance achieved2 linked violations
October 25, 2011State Public Notification received1 linked violation
October 17, 2011State Violation/Reminder Notice1 linked violation
October 17, 2011State Public Notification requested2 linked violations
October 17, 2011State Violation/Reminder Notice1 linked violation
December 3, 2010State Compliance achieved2 linked violations
October 8, 2010State Compliance achieved8 linked violations
October 8, 2010State Compliance achieved2 linked violations
October 14, 2009State Public Notification received2 linked violations
October 5, 2009State Public Notification requested5 linked violations
October 5, 2009State Violation/Reminder Notice2 linked violations
October 5, 2009State Violation/Reminder Notice2 linked violations
September 21, 2009State Public Notification received5 linked violations
September 10, 2009State Violation/Reminder Notice6 linked violations
June 14, 2007State Public Notification received1 linked violation
April 26, 2006State Compliance achieved2 linked violations
February 10, 2006State Public Notification requested1 linked violation
July 7, 2005State Compliance achieved30 linked violations
April 15, 2005State Public Notification requested21 linked violations
April 14, 2005State Public Notification requested13 linked violations
December 3, 2002State Compliance achieved2 linked violations
July 10, 2002State Public Notification received2 linked violations
July 10, 2002State Compliance achieved35 linked violations
June 20, 2002State Public Notification requested1 linked violation
June 20, 2002State Violation/Reminder Notice1 linked violation
May 8, 2002State Public Notification received3 linked violations
April 19, 2002State Violation/Reminder Notice1 linked violation
April 19, 2002State Public Notification requested1 linked violation
October 10, 1983State no additional Formal Action needed1 linked violation

Contact

ADVANCED WATER SAMPLING

406-214-8285

MISSOULA, MT 59806