SHERIDAN, MT · Madison County

SHERIDAN TOWN OF 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): MT0000329
System type: Community Water System
Population served: 632
Service connections: 413
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2025 – December 31, 2025
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2024 – February 18, 2025
Resolved
Monitoring, Regular
—
Styrene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Benzene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Toluene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Endrin
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Simazine
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Picloram
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
LASSO
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2023 – December 31, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2017 – March 31, 2017
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – August 6, 2014
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2014 – March 31, 2014
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2014 – August 1, 2016
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2013 – December 31, 2013
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2013 – December 31, 2013
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2013 – December 31, 2013
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2013 – July 19, 2013
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2011 – October 23, 2013
Resolved
Monitoring, Regular
—
Chromium
January 1, 2011 – October 23, 2013
Resolved
Monitoring, Regular
—
Selenium
January 1, 2011 – October 23, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2011 – October 23, 2013
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2011 – October 23, 2013
Resolved
Monitoring, Regular
—
Barium
January 1, 2011 – October 23, 2013
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2010 – September 25, 2013
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2010 – July 19, 2018
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2009 – December 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2008 – December 31, 2008
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2007 – June 23, 2009
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2007 – August 31, 2007
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2007 – July 31, 2007
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2007 – April 30, 2007
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2007 – March 31, 2007
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – February 15, 2007
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2005 – December 31, 2005
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2025 – December 31, 2025	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
December 30, 2024 – February 18, 2025	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Styrene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Benzene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Toluene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Endrin	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Simazine	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Picloram	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	LASSO	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Heptachlor epoxide	—	Resolved
March 1, 2017 – March 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2014 – August 6, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2014 – March 31, 2014	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2014 – August 1, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
October 1, 2013 – December 31, 2013	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2013 – December 31, 2013	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2013 – December 31, 2013	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2013 – July 19, 2013	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2011 – October 23, 2013	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2011 – October 23, 2013	Monitoring, Regular	Chromium	—	Resolved
January 1, 2011 – October 23, 2013	Monitoring, Regular	Selenium	—	Resolved
January 1, 2011 – October 23, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Asbestos	—	Resolved
January 1, 2011 – October 23, 2013	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2011 – October 23, 2013	Monitoring, Regular	Barium	—	Resolved
October 1, 2010 – September 25, 2013	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2010 – July 19, 2018	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
October 1, 2007 – June 23, 2009	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
August 1, 2007 – August 31, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2007 – July 31, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2007 – April 30, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
March 1, 2007 – March 31, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2006 – February 15, 2007	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrate-Nitrite	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

January 28, 2026State Compliance achieved21 linked violations
January 28, 2026State Compliance achieved23 linked violations
January 28, 2026State Compliance achieved2 linked violations
January 24, 2026State Public Notification requested21 linked violations
January 24, 2026State Violation/Reminder Notice21 linked violations
January 23, 2026State Violation/Reminder Notice23 linked violations
January 23, 2026State Public Notification requested1 linked violation
January 23, 2026State Violation/Reminder Notice1 linked violation
January 23, 2026State Public Notification requested23 linked violations
January 22, 2026State Compliance achieved1 linked violation
January 13, 2026State Public Notification requested1 linked violation
January 13, 2026State Violation/Reminder Notice1 linked violation
February 18, 2025State Compliance achieved1 linked violation
February 4, 2025State Violation/Reminder Notice1 linked violation
July 19, 2018State Compliance achieved1 linked violation
August 23, 2017State Compliance achieved1 linked violation
April 14, 2017State Public Notification requested1 linked violation
April 14, 2017State Violation/Reminder Notice1 linked violation
April 6, 2017State Compliance achieved1 linked violation
August 1, 2016State Compliance achieved1 linked violation
August 6, 2014State Compliance achieved1 linked violation
July 14, 2014State Violation/Reminder Notice1 linked violation
June 30, 2014State Compliance achieved1 linked violation
June 30, 2014State Compliance achieved1 linked violation
June 30, 2014State Compliance achieved1 linked violation
June 30, 2014State Compliance achieved1 linked violation
June 30, 2014State Compliance achievedgeneral compliance action — not tied to a specific violation on record
April 17, 2014State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
April 17, 2014State Public Notification requested1 linked violation
April 17, 2014State Violation/Reminder Notice1 linked violation
April 17, 2014State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 24, 2014State Public Notification requested1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
January 24, 2014State Public Notification requested6 linked violations
January 24, 2014State Violation/Reminder Notice6 linked violations
January 23, 2014State Violation/Reminder Notice1 linked violation
January 16, 2014State Violation/Reminder Notice1 linked violation
January 16, 2014State Violation/Reminder Notice1 linked violation
January 16, 2014State Public Notification requested1 linked violation
January 16, 2014State Violation/Reminder Notice1 linked violation
January 16, 2014State Public Notification requested1 linked violation
January 16, 2014State Public Notification requested1 linked violation
October 23, 2013State Compliance achieved6 linked violations
September 25, 2013State Compliance achieved1 linked violation
July 19, 2013State Compliance achieved1 linked violation
July 16, 2013State Violation/Reminder Notice1 linked violation
October 31, 2012State Violation/Reminder Notice1 linked violation
October 31, 2012State Public Notification requested1 linked violation
January 14, 2011State Violation/Reminder Notice1 linked violation
October 15, 2010State Compliance achieved2 linked violations
January 24, 2010State Violation/Reminder Notice2 linked violations
January 24, 2010State Public Notification requested2 linked violations
September 25, 2009State Compliance achieved7 linked violations
June 24, 2009State Public Notification received2 linked violations
May 15, 2009State Compliance achieved4 linked violations
March 20, 2009State Administrative/Compliance Order with penalty issued11 linked violations
November 24, 2008State Other3 linked violations
November 19, 2008State Other6 linked violations
October 27, 2008State Public Notification requested3 linked violations
January 19, 2008State Violation/Reminder Notice3 linked violations
January 19, 2008State Public Notification requested3 linked violations
October 29, 2007State Compliance achieved2 linked violations
September 18, 2007State Public Notification requested2 linked violations
September 18, 2007State Violation/Reminder Notice4 linked violations
August 29, 2007State Violation/Reminder Notice3 linked violations
May 21, 2007State Violation/Reminder Notice3 linked violations
April 17, 2007State Violation/Reminder Notice2 linked violations
April 17, 2007State Public Notification requested1 linked violation
February 5, 2007State Violation/Reminder Notice1 linked violation
February 14, 2006State Compliance achieved1 linked violation
February 10, 2006State Public Notification requested1 linked violation
February 10, 2006State Violation/Reminder Notice1 linked violation
July 6, 2005State Compliance achieved4 linked violations
April 14, 2005State Violation/Reminder Notice4 linked violations
April 14, 2005State Public Notification requested5 linked violations
January 4, 2005State Violation/Reminder Notice1 linked violation

Contact

MILLHOUSE, KRISTI

406-842-5431

SHERIDAN, MT 59749