MISSOULA, MT · Missoula County
HAPPY VALLEY MHP Water System
Consumer Confidence Report status
HAPPY VALLEY MHP 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 HAPPY VALLEY MHP.
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)
- MT0000377
- System type
- Community Water System
- Population served
- 55
- Service connections
- 22
- Ownership
- privately owned
- Water source
- groundwater (wells)
HAPPY VALLEY MHP is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 55 people from groundwater.
As of August 1, 2026, its federal record holds 8 entries between 1993 and 2024, all of which EPA lists as closed.
Of the 8, 5 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 the Lead and Copper Rule, the Consumer Confidence Rule, and the Total Coliform Rules.
Violation history
Lead Consumer Notice
—Lead and Copper Rule
December 30, 2024 – November 14, 2025
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2017 – August 30, 2017
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2015 – July 17, 2015
ResolvedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
October 1, 2013 – October 24, 2013
ResolvedLead Consumer Notice
—Lead and Copper Rule
January 1, 2013 – February 11, 2013
ResolvedMonitoring, Repeat Major (TCR)
—Coliform (TCR)
July 1, 1994 – July 31, 1994
ResolvedMonitoring, Regular
—Nitrate
January 1, 1994 – December 31, 1994
ResolvedInitial Tap Sampling for Pb and Cu
—Lead and Copper Rule
July 1, 1993 – November 27, 1996
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| December 30, 2024 – November 14, 2025 | Lead Consumer Notice | Lead and Copper Rule | — | Resolved |
| July 1, 2017 – August 30, 2017 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| July 1, 2015 – July 17, 2015 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| October 1, 2013 – October 24, 2013 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| January 1, 2013 – February 11, 2013 | Lead Consumer Notice | Lead and Copper Rule | — | Resolved |
| July 1, 1994 – July 31, 1994 | Monitoring, Repeat Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Nitrate | — | Resolved |
| July 1, 1993 – November 27, 1996 | Initial Tap Sampling for Pb and Cu | Lead and Copper Rule | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- November 14, 2025State Compliance achieved1 linked violation
- April 2, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- February 4, 2025State Violation/Reminder Notice1 linked violation
- January 15, 2025State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
- January 15, 2025State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- August 30, 2017State Compliance achieved1 linked violation
- July 20, 2017State Violation/Reminder Notice2 linked violations
- July 17, 2015State Compliance achieved1 linked violation
- July 15, 2015State Violation/Reminder Notice2 linked violations
- December 20, 2013State Violation/Reminder Notice2 linked violations
- October 24, 2013State Compliance achieved1 linked violation
- February 11, 2013State Compliance achieved2 linked violations
- January 14, 2013State Violation/Reminder Notice1 linked violation
- January 6, 2009State Compliance achieved7 linked violations
- August 21, 2008State Compliance achieved1 linked violation
- March 11, 2002State Compliance achieved6 linked violations
- February 20, 2002State Public Notification received2 linked violations
- December 16, 2001State Public Notification requested11 linked violations
- December 9, 2001State Violation/Reminder Notice1 linked violation
- December 9, 2001State Public Notification requested2 linked violations
- May 15, 2001State Compliance achieved1 linked violation
- December 31, 2000State Compliance achieved1 linked violation
- November 27, 1996State Formal Notice of Violation issued5 linked violations
Common questions
Is HAPPY VALLEY MHP required to publish a Consumer Confidence Report?
- Yes. HAPPY VALLEY MHP 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 HAPPY VALLEY MHP’s next Consumer Confidence Report due?
- HAPPY VALLEY MHP’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does HAPPY VALLEY MHP have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for HAPPY VALLEY MHP.
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
MULLINS, NATHAN
406-317-3913
MISSOULA, MT 59807