Is HERON COMMUNITY WATER SYSTEM required to publish a Consumer Confidence Report?

Yes. HERON COMMUNITY 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 HERON COMMUNITY WATER SYSTEM’s next Consumer Confidence Report due?

HERON COMMUNITY 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.

HERON, MT · Sanders County

HERON COMMUNITY WATER SYSTEM Water System

Consumer Confidence Report status

HERON COMMUNITY 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 HERON COMMUNITY 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): MT0000247
System type: Community Water System
Population served: 84
Service connections: 46
Ownership: local government
Water source: groundwater (wells)

HERON COMMUNITY WATER SYSTEM is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 84 people from groundwater.

As of August 1, 2026, its federal record holds 51 entries between 1994 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.

Of the 51, 50 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 volatile organic chemicals, synthetic organic chemicals, and the Total Coliform Rules.

Violation history

Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2020 – January 25, 2021
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2014 – May 31, 2014
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2012 – May 8, 2012
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2011 – December 12, 2012
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2011 – December 12, 2012
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 2007 – December 31, 2007
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2006 – December 31, 2006
Archived
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
LASSO
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Benzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Toluene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Styrene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Endrin
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2002 – December 31, 2004
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2001 – September 21, 2005
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 1999 – February 28, 1999
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1998 – July 31, 1998
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 1997 – September 30, 1997
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 1997 – July 15, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 1996 – April 30, 1996
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1994 – July 31, 1994
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
December 30, 2020 – January 25, 2021	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
May 1, 2014 – May 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2012 – May 8, 2012	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2011 – December 12, 2012	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2011 – December 12, 2012	Monitoring, Regular	Fluoride	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
October 1, 2007 – December 31, 2007	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate-Nitrite	—	Archived
January 1, 2002 – December 31, 2004	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	LASSO	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Benzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Toluene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Styrene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Endrin	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
October 1, 2001 – September 21, 2005	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
February 1, 1999 – February 28, 1999	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1998 – July 31, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 1997 – September 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 1997 – July 15, 2008	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
April 1, 1996 – April 30, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1994 – July 31, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

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

Enforcement actions

May 27, 2014State Public Notification requested3 linked violations
January 24, 2014State Violation/Reminder Notice2 linked violations
January 24, 2014State Public Notification requested1 linked violation
May 8, 2012State Compliance achieved2 linked violations
September 26, 2008State Compliance achieved13 linked violations
July 24, 2008State Violation/Reminder Notice2 linked violations
July 24, 2008State Public Notification requested2 linked violations
July 15, 2008State Compliance achieved1 linked violation
July 15, 2008State Compliance achieved2 linked violations
May 3, 2008State Public Notification requested1 linked violation
February 8, 2008State Violation/Reminder Notice14 linked violations
February 8, 2008State Violation/Reminder Notice3 linked violations
February 8, 2008State Public Notification requested2 linked violations
February 8, 2008State Public Notification requested5 linked violations
April 20, 2007State Compliance achieved54 linked violations
August 25, 2006State Violation/Reminder Notice1 linked violation
August 25, 2006State Public Notification requested1 linked violation
August 25, 2006State Violation/Reminder Notice1 linked violation
August 25, 2006State Violation/Reminder Notice1 linked violation
August 25, 2006State Public Notification requested1 linked violation
August 25, 2006State Violation/Reminder Notice1 linked violation
January 18, 2006State Compliance achieved26 linked violations
January 5, 2006State Compliance achieved22 linked violations
September 21, 2005State Compliance achieved1 linked violation
July 6, 2005State Compliance achieved4 linked violations
April 15, 2005State Public Notification requested21 linked violations
April 15, 2005State Violation/Reminder Notice21 linked violations
April 14, 2005State Violation/Reminder Notice4 linked violations
April 14, 2005State Public Notification requested26 linked violations
April 14, 2005State Violation/Reminder Notice26 linked violations
April 14, 2005State Public Notification requested4 linked violations
April 13, 2005State Public Notification requested1 linked violation
April 13, 2005State Violation/Reminder Notice1 linked violation
December 3, 2002State Compliance achieved1 linked violation
November 2, 2001State Compliance achieved1 linked violation
September 24, 2001State Public Notification requested1 linked violation
September 24, 2001State Violation/Reminder Notice1 linked violation
June 9, 2001State Violation/Reminder Notice1 linked violation
June 9, 2001State Public Notification requested1 linked violation
June 9, 2001State Violation/Reminder Notice1 linked violation
May 15, 2001State Compliance achieved1 linked violation
December 31, 2000State Violation/Reminder Notice1 linked violation
April 3, 1999State Violation/Reminder Notice1 linked violation
April 3, 1999State Public Notification requested1 linked violation
September 11, 1998State Violation/Reminder Notice2 linked violations
August 31, 1996State Violation/Reminder Notice1 linked violation
May 30, 1996State Violation/Reminder Notice1 linked violation
August 19, 1994State Violation/Reminder Notice4 linked violations

Common questions

Is HERON COMMUNITY WATER SYSTEM required to publish a Consumer Confidence Report?: Yes. HERON COMMUNITY 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 HERON COMMUNITY WATER SYSTEM’s next Consumer Confidence Report due?: HERON COMMUNITY WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does HERON COMMUNITY WATER SYSTEM have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for HERON COMMUNITY 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

JENSEN, CLINT

406-847-2333

HERON, MT 59844