Is RYAN DAM WATER SYSTEM required to publish a Consumer Confidence Report?

Yes. RYAN DAM WATER SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is RYAN DAM WATER SYSTEM’s next Consumer Confidence Report due?

RYAN DAM WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

HELENA, MT · Cascade County

RYAN DAM WATER SYSTEM Water System

Consumer Confidence Report status

RYAN DAM WATER SYSTEM must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for RYAN DAM WATER SYSTEM.

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): MT0000046
System type: Community Water System
Population served: 230
Service connections: 14
Ownership: privately owned
Water source: groundwater (wells)

RYAN DAM WATER SYSTEM is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 230 people from groundwater.

As of August 1, 2026, its federal record holds 48 entries between 1993 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.

Of the 48, 41 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, the Total Coliform Rules, and the Lead and Copper Rule.

Violation history

Treatment Technique, Level 1 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
May 24, 2023 – June 5, 2023
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
April 20, 2023 – April 25, 2023
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2023 – December 31, 2025
Archived
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2023 – December 31, 2025
Archived
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
July 1, 2019 – July 31, 2019
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2019 – July 19, 2019
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
July 1, 2018 – July 31, 2018
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
October 1, 2012 – October 15, 2012
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2011 – February 28, 2011
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – July 24, 2013
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2011 – February 28, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2008 – July 31, 2008
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2008 – August 15, 2008
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2008 – December 31, 2016
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2008 – December 31, 2016
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2007 – October 31, 2007
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2006 – September 30, 2006
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2004 – June 19, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2004 – September 30, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2004 – July 31, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2002 – August 31, 2002
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
2,4-D
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
2,3,7,8-TCDD
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
LASSO
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Atrazine
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Picloram
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Simazine
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Endothall
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Diquat
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Endrin
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1997 – June 30, 1997
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 1997 – April 30, 1997
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
October 1, 1995 – October 31, 1995
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1995 – March 31, 1995
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1993 – November 25, 1996
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
May 24, 2023 – June 5, 2023	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
April 20, 2023 – April 25, 2023	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
January 1, 2023 – December 31, 2025	Monitoring and Reporting (DBP)	TTHM	—	Archived
July 1, 2019 – July 31, 2019	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
July 1, 2019 – July 19, 2019	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2018 – July 31, 2018	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
October 1, 2012 – October 15, 2012	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2011 – February 28, 2011	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2011 – July 24, 2013	Monitoring, Regular	Asbestos	—	Resolved
January 1, 2011 – February 28, 2011	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2008 – July 31, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2008 – August 15, 2008	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2008 – December 31, 2016	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2008 – December 31, 2016	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
October 1, 2007 – October 31, 2007	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2006 – September 30, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2004 – June 19, 2002	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
September 1, 2004 – September 30, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2004 – July 31, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
August 1, 2002 – August 31, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	2,4-D	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	LASSO	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Atrazine	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Picloram	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Simazine	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Endothall	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Diquat	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Endrin	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Pentachlorophenol	—	Resolved
June 1, 1997 – June 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 1997 – April 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 1995 – October 31, 1995	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
March 1, 1995 – March 31, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1993 – November 25, 1996	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved

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

Enforcement actions

November 5, 2025State Public Notification received2 linked violations
October 22, 2025State Violation/Reminder Notice2 linked violations
October 22, 2025State Public Notification requested2 linked violations
June 19, 2023State Public Notification requested1 linked violation
June 19, 2023State Violation/Reminder Notice1 linked violation
June 19, 2023State Public Notification received1 linked violation
June 8, 2023State Public Notification requested1 linked violation
June 8, 2023State Violation/Reminder Notice1 linked violation
June 5, 2023State Compliance achieved1 linked violation
April 25, 2023State Compliance achieved1 linked violation
September 24, 2019State Public Notification received1 linked violation
September 4, 2019State Compliance achieved1 linked violation
August 20, 2019State Public Notification requested1 linked violation
August 20, 2019State Violation/Reminder Notice1 linked violation
July 19, 2019State Compliance achieved1 linked violation
July 17, 2019State Violation/Reminder Notice1 linked violation
September 5, 2018State Compliance achieved1 linked violation
August 28, 2018State Public Notification received1 linked violation
August 16, 2018State Public Notification requested1 linked violation
August 16, 2018State Violation/Reminder Notice1 linked violation
February 15, 2017State Compliance achieved1 linked violation
February 15, 2017State Compliance achieved1 linked violation
February 2, 2017State Public Notification requested1 linked violation
February 2, 2017State Public Notification requested1 linked violation
February 2, 2017State Violation/Reminder Notice1 linked violation
February 2, 2017State Violation/Reminder Notice1 linked violation
January 24, 2014State Public Notification requested1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
July 24, 2013State Compliance achieved1 linked violation
October 15, 2012State Compliance achieved1 linked violation
October 5, 2012State Violation/Reminder Notice1 linked violation
February 28, 2011State Compliance achieved2 linked violations
February 23, 2011State Public Notification received2 linked violations
February 11, 2011State Violation/Reminder Notice2 linked violations
September 25, 2009State Compliance achieved11 linked violations
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved2 linked violations
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved1 linked violation
January 28, 2009State Public Notification received2 linked violations
January 22, 2009State Violation/Reminder Notice3 linked violations
January 22, 2009State Public Notification requested2 linked violations
August 15, 2008State Compliance achieved2 linked violations
July 3, 2008State Violation/Reminder Notice2 linked violations
January 14, 2008State Public Notification received1 linked violation
October 14, 2007State Violation/Reminder Notice2 linked violations
October 14, 2007State Public Notification requested2 linked violations
October 14, 2007State Violation/Reminder Notice2 linked violations
October 3, 2006State Violation/Reminder Notice4 linked violations
October 3, 2006State Public Notification requested6 linked violations
October 3, 2006State Violation/Reminder Notice4 linked violations
September 19, 2005State Compliance achieved35 linked violations
January 19, 2005State Compliance achieved3 linked violations
September 10, 2004State Compliance achieved2 linked violations
September 3, 2004State Public Notification requested1 linked violation
September 3, 2004State Violation/Reminder Notice1 linked violation
December 3, 2002State Compliance achieved2 linked violations
July 5, 2002State Violation/Reminder Notice64 linked violations
September 24, 2001State Public Notification requested1 linked violation
September 24, 2001State Violation/Reminder Notice1 linked violation
April 30, 2001State Compliance achieved1 linked violation
May 29, 1997State Violation/Reminder Notice1 linked violation

Common questions

Is RYAN DAM WATER SYSTEM required to publish a Consumer Confidence Report?: Yes. RYAN DAM WATER SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is RYAN DAM WATER SYSTEM’s next Consumer Confidence Report due?: RYAN DAM WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does RYAN DAM WATER SYSTEM have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for RYAN DAM WATER SYSTEM.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

TOLLEFSON, JORDAN

406-443-8907

HELENA, MT 59620-0901