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Clean Air Act stationary source · ICIS-AIR MT0000003002900008

WEYERHAEUSER-CFALLS, Columbia Falls, MT: Clean Air Act compliance record, inspections, violations, penalties

WEYERHAEUSER-CFALLS, at 105 MILLS DRIVE, Columbia Falls in Flathead County, Montana, is an operating major source of air pollution on EPA’s ICIS-AIR register. EPA’s file records its current violation status (ICIS-AIR’s high-priority violation field) as “Addressed-State”. Flathead County is on EPA’s Green Book list of areas that do not meet a national air quality standard. The status and classification are as EPA’s facility file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the source’s current standing, quarter by quarter.

Identity

Facility as filedWEYERHAEUSER-CFALLS
ICIS-AIR IDMT0000003002900008
EPA facility registry ID110000428644
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)Addressed-State
Address105 MILLS DRIVE, Columbia Falls, MT 59912
CountyFlathead County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Wood product manufacturing (NAICS 3212)
EPA region08

Cited to the EPA ICIS-AIR facility file (ECHO download).

Programs and pollutants

Velarion’s copy of EPA’s ICIS-AIR download does not include its program, pollutant and Title V certification files, so this page does not list the Clean Air Act programs WEYERHAEUSER-CFALLS is under or the pollutants it is permitted for. The programs each evaluation and violation below was recorded under are shown with it. EPA’s free Detailed Facility Report lists both.

Compliance evaluations

DateWhat EPA recordedAgencyPrograms
June 9, 2025FCE On-SiteStateMACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
July 14, 2023FCE On-SiteStateMACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
July 14, 2021FCE On-SiteStateMACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
July 8, 2019FCE Off-SiteStateMACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits

Violations

A high-priority violation (HPV) is the most serious class of Clean Air Act non-compliance an agency records; a federally reportable violation (FRV) is the next step down. Each row is one determination as EPA’s violation history files it.

DateWhat EPA recordedAgencyPrograms
June 18, 2025Earliest FRV determinationStateMACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits

Enforcement and penalties

0 formal enforcement actions since January 1, 2017, 0 of them with a penalty filed above zero. Each penalty is shown as EPA’s formal action file states it; “Not stated” means the file gives no figure, and $0 is a disclosed zero.

Informal enforcement

DateWhat EPA recordedAgency
September 17, 2025Notice of ViolationState

Stack tests

DateWhat EPA recordedAgency
August 25, 2025PassState
August 12, 2025FailState
August 23, 2024PassState
August 9, 2024PassState
October 31, 2023PassState
October 31, 2023PassState
October 31, 2023PassState
August 9, 2023PassState
July 17, 2023PassState
July 17, 2023PassState
August 8, 2022PassState
July 26, 2022PassState
August 23, 2021PassState
August 23, 2021PassState
July 29, 2021PassState
July 29, 2021PassState
November 9, 2020PassState
November 9, 2020PassState
November 9, 2020PassState
September 30, 2020PassState
January 15, 2020PassState
January 15, 2020PassState
October 22, 2019PassState
July 25, 2019PassState
October 18, 2018PassState
October 18, 2018PassState
November 16, 2017PassState
November 16, 2017PassState
November 16, 2017PassState
September 18, 2017PassState
September 18, 2017PassState
August 17, 2017PassState
January 26, 2017PassState

Cited to the EPA ICIS-AIR evaluation, violation, stack test and enforcement files (ECHO download), events dated January 1, 2017 or later as loaded; up to 50 rows of each shown, newest first.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every source on ECHO: its compliance status quarter by quarter, its evaluations, and its violations, enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter EPA facility registry ID 110000428644 there.

Nearby on the register

Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.

What this page shows

The Velarion Records public-records page covers the Clean Air Act compliance record for WEYERHAEUSER-CFALLS in Columbia Falls, MT, listing 4 compliance evaluations, 0 high-priority violations, and 0 formal enforcement actions since January 1, 2017. It lists operating status Operating, emissions classification Major source, and current violation status Addressed-State, with the facility at 105 MILLS DRIVE in Flathead County, Montana. The page also notes Flathead County is on EPA's Green Book list of areas that do not meet a national air quality standard.