Is SPHINX MOUNTAIN MB HM PK required to publish a Consumer Confidence Report?

Yes. SPHINX MOUNTAIN MB HM PK 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 SPHINX MOUNTAIN MB HM PK’s next Consumer Confidence Report due?

SPHINX MOUNTAIN MB HM PK’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.

GARDINER, MT · Park County

SPHINX MOUNTAIN MB HM PK Water System

Consumer Confidence Report status

SPHINX MOUNTAIN MB HM PK 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 SPHINX MOUNTAIN MB HM PK.

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): MT0003755
System type: Community Water System
Population served: 52
Service connections: 19
Ownership: privately owned
Water source: groundwater (wells)

SPHINX MOUNTAIN MB HM PK is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 52 people from groundwater.

As of August 1, 2026, its federal record holds 16 entries between 1999 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.

Of the 16, 9 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 Radionuclides and Revised Rad Rule, and the Lead and Copper Rule.

Violation history

Monitoring, Regular
—
Carbofuran
January 1, 2020 – December 31, 2022
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2015 – February 1, 2016
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
December 1, 2012 – April 28, 2016
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
December 1, 2012 – April 28, 2016
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2011 – September 15, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
July 1, 2010 – September 30, 2010
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 2010 – June 28, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
April 1, 2010 – June 30, 2010
Archived
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2009 – June 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2009 – March 31, 2009
Resolved
Monitoring, Regular
—
Arsenic
October 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2008 – March 31, 2008
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
April 1, 2006 – April 30, 2006
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2004 – November 3, 2011
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
October 1, 2003 – October 21, 2003
Resolved
Monitoring, Regular
—
Arsenic
January 1, 1999 – December 31, 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 – December 31, 2022	Monitoring, Regular	Carbofuran	—	Resolved
December 30, 2015 – February 1, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
December 1, 2012 – April 28, 2016	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
December 1, 2012 – April 28, 2016	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
July 1, 2011 – September 15, 2011	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2010 – September 30, 2010	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
April 1, 2010 – June 28, 2010	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
April 1, 2010 – June 30, 2010	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2008 – December 31, 2008	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Arsenic	—	Resolved
April 1, 2006 – April 30, 2006	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2004 – November 3, 2011	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2003 – October 21, 2003	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Arsenic	—	Resolved

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

Enforcement actions

February 7, 2023State Compliance achieved2 linked violations
January 29, 2023State Violation/Reminder Notice3 linked violations
January 29, 2023State Public Notification requested2 linked violations
January 29, 2023State Violation/Reminder Notice2 linked violations
January 29, 2023State Violation/Reminder Notice4 linked violations
January 29, 2023State Public Notification requested2 linked violations
February 1, 2016State Violation/Reminder Notice3 linked violations
February 1, 2016State Compliance achieved2 linked violations
January 15, 2013State Public Notification requested3 linked violations
November 3, 2011Federal Compliance achieved6 linked violations
August 1, 2011State Public Notification requested3 linked violations
October 21, 2010State Public Notification requested3 linked violations
September 23, 2010Federal Final Administrative Order issued3 linked violations
September 9, 2009Federal Final Administrative Order issued6 linked violations
April 14, 2006State Public Notification requested12 linked violations

Common questions

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

BROZOVSKY, NEWMAN V

406-848-9200

GARDINER, MT 59030