Public Water Partners

THOMPSON FALLS, MT · Sanders County

THOMPSON FALLS CITY OF Water System

Consumer Confidence Report status

THOMPSON FALLS CITY OF 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 THOMPSON FALLS CITY OF.

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)
MT0000341
System type
Community Water System
Population served
1,950
Service connections
719
Ownership
local government
Water source
groundwater (wells)

THOMPSON FALLS CITY OF is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 1,950 people from groundwater.

As of August 1, 2026, its federal record holds 15 entries between 1992 and 2015, all of which EPA lists as closed. Nothing has been added since 2015.

Of the 15, 13 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 Total Coliform Rules, and the Consumer Confidence Rule.

Violation history

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2015 – July 17, 2015

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    November 1, 2005 – November 30, 2005

    Resolved

  • Treatment Technique (SWTR and GWR)

    Health-based

    Surface Water Treatment Rule

    December 1, 1999 – December 31, 1999

    Resolved

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    April 1, 1997 – April 30, 1997

    Resolved

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    January 1, 1997 – January 31, 1997

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 1996 – December 31, 1996

    Resolved

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    June 1, 1994 – June 30, 1994

    Resolved

  • Monitoring, Regular

    —

    Barium

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Mercury

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Antimony, Total

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Arsenic

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Beryllium, Total

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    July 1, 1992 – July 31, 1992

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

Common questions

Is THOMPSON FALLS CITY OF required to publish a Consumer Confidence Report?

Yes. THOMPSON FALLS CITY OF 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 THOMPSON FALLS CITY OF’s next Consumer Confidence Report due?

THOMPSON FALLS CITY OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does THOMPSON FALLS CITY OF have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for THOMPSON FALLS CITY OF.

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

HARNETT, JONATHAN O

406-827-3557

THOMPSON FALLS, MT 59813