Is MOUNTAIN HERITAGE WATER SYSTEM required to publish a Consumer Confidence Report?

Yes. MOUNTAIN HERITAGE 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 MOUNTAIN HERITAGE WATER SYSTEM’s next Consumer Confidence Report due?

MOUNTAIN HERITAGE 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 · Lewis and Clark County

MOUNTAIN HERITAGE WATER SYSTEM Water System

Consumer Confidence Report status

MOUNTAIN HERITAGE 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 MOUNTAIN HERITAGE 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): MT0002873
System type: Community Water System
Population served: 175
Service connections: 76
Ownership: privately owned
Water source: groundwater (wells)

MOUNTAIN HERITAGE WATER SYSTEM is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 175 people from groundwater.

As of August 1, 2026, its federal record holds 19 entries between 1999 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.

All 19 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 inorganic chemicals, the Lead and Copper Rule, and the Stage 1 Disinfectants and Disinfection Byproducts Rule.

Violation history

Monitoring, Regular
—
Beryllium, Total
January 1, 2020 – May 9, 2022
Resolved
Monitoring, Regular
—
Selenium
January 1, 2020 – May 9, 2022
Resolved
Monitoring, Regular
—
Chromium
January 1, 2020 – May 9, 2022
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2020 – May 9, 2022
Resolved
Monitoring, Regular
—
Mercury
January 1, 2020 – May 9, 2022
Resolved
Monitoring, Regular
—
Nickel
January 1, 2020 – May 9, 2022
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2020 – May 9, 2022
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2020 – May 9, 2022
Resolved
Monitoring, Regular
—
Barium
January 1, 2020 – May 9, 2022
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2020 – May 9, 2022
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
April 1, 2019 – February 25, 2021
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2018 – January 30, 2018
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2017 – January 30, 2018
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2014 – January 30, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2006 – December 31, 2006
Archived
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2006 – December 31, 2006
Archived
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2005 – December 31, 2005
Archived
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2005 – December 31, 2005
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 1999 – March 1, 2001
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
January 1, 2020 – May 9, 2022	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2020 – May 9, 2022	Monitoring, Regular	Selenium	—	Resolved
January 1, 2020 – May 9, 2022	Monitoring, Regular	Chromium	—	Resolved
January 1, 2020 – May 9, 2022	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2020 – May 9, 2022	Monitoring, Regular	Mercury	—	Resolved
January 1, 2020 – May 9, 2022	Monitoring, Regular	Nickel	—	Resolved
January 1, 2020 – May 9, 2022	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2020 – May 9, 2022	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2020 – May 9, 2022	Monitoring, Regular	Barium	—	Resolved
January 1, 2020 – May 9, 2022	Monitoring, Regular	Cadmium	—	Resolved
April 1, 2019 – February 25, 2021	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2018 – January 30, 2018	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2017 – January 30, 2018	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2014 – January 30, 2014	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	TTHM	—	Archived
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	TTHM	—	Archived
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
January 1, 1999 – March 1, 2001	Follow-up Or Routine LCR Tap M/R	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

January 29, 2023State Violation/Reminder Notice10 linked violations
January 29, 2023State Public Notification requested10 linked violations
May 9, 2022State Compliance achieved10 linked violations
February 25, 2021State Compliance achieved1 linked violation
April 15, 2019State Violation/Reminder Notice1 linked violation
January 30, 2018State Compliance achieved1 linked violation
January 30, 2018State Compliance achieved1 linked violation
January 22, 2018State Public Notification requested1 linked violation
January 22, 2018State Violation/Reminder Notice1 linked violation
July 18, 2017State Violation/Reminder Notice1 linked violation
July 18, 2017State Public Notification requested1 linked violation
January 30, 2014State Compliance achieved1 linked violation
January 23, 2014State Violation/Reminder Notice1 linked violation
July 28, 2008State Compliance achieved5 linked violations
June 21, 2007State Administrative/Compliance Order with penalty issued6 linked violations
April 29, 2007State Violation/Reminder Notice2 linked violations
April 29, 2007State Public Notification requested2 linked violations
June 2, 2006State Other4 linked violations
February 25, 2006State Public Notification requested2 linked violations
February 25, 2006State Violation/Reminder Notice2 linked violations
February 24, 2005State Violation/Reminder Notice2 linked violations
February 24, 2005State Public Notification requested3 linked violations
March 1, 2001State Compliance achieved1 linked violation
March 1, 2001State Violation/Reminder Notice1 linked violation
March 1, 2001State Violation/Reminder Notice1 linked violation
January 31, 2001State Compliance achieved2 linked violations
September 22, 1994State Violation/Reminder Notice1 linked violation

Common questions

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

SWERINGEN, DENNIS

805-390-4527

HELENA, MT 59602