Clean Air Act stationary source · ICIS-AIR WI0000005507300005
AHLSTROM MOSINEE, LLC, Mosinee, WI: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Major sourceEmissions classification
- Unaddressed-StateCurrent violation status, as filed
- 25Compliance evaluations since January 1, 2017
- 2High-priority violations since January 1, 2017
- 0Formal enforcement actions since January 1, 2017
AHLSTROM MOSINEE, LLC, at 100 MAIN ST, Mosinee in Marathon County, Wisconsin, 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 “Unaddressed-State”. Marathon 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 filed | AHLSTROM MOSINEE, LLC |
|---|---|
| ICIS-AIR ID | WI0000005507300005 |
| EPA facility registry ID | 110000422043 |
| Operating status | Operating |
| Emissions classification | Major source |
| Current violation status (ICIS-AIR high-priority violation field) | Unaddressed-State |
| Address | 100 MAIN ST, Mosinee, WI 544551440 |
| County | Marathon County |
| In a nonattainment county | Yes (EPA Green Book) |
| Industry (NAICS) | Paper manufacturing (NAICS 3221) |
| SIC code | 2621 |
| EPA region | 05 |
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 AHLSTROM MOSINEE, LLC 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
- 25Evaluations since January 1, 2017
- 5Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| July 1, 2026 | FCE On-Site | State | Title V Permits |
| May 18, 2026 | PCE Off-Site | State | Title V Permits |
| February 4, 2026 | PCE Off-Site | State | Title V Permits |
| October 30, 2025 | PCE Off-Site | State | Title V Permits |
| April 30, 2025 | PCE Off-Site | State | Title V Permits |
| April 30, 2025 | PCE Off-Site | State | Title V Permits |
| March 31, 2025 | PCE Off-Site | State | Title V Permits |
| March 24, 2025 | PCE Off-Site | State | Title V Permits |
| February 3, 2025 | PCE Off-Site | State | Title V Permits |
| January 29, 2025 | PCE Off-Site | State | Title V Permits |
| January 29, 2025 | PCE Off-Site | State | Title V Permits |
| January 29, 2025 | PCE Off-Site | State | Title V Permits |
| January 7, 2025 | PCE Off-Site | State | Title V Permits |
| December 9, 2024 | PCE Off-Site | State | Title V Permits |
| November 21, 2024 | PCE Off-Site | State | Title V Permits |
| November 19, 2024 | PCE Off-Site | State | Title V Permits |
| October 31, 2024 | PCE Off-Site | State | Title V Permits |
| October 7, 2024 | PCE Off-Site | State | Title V Permits |
| September 30, 2024 | PCE Off-Site | State | Title V Permits |
| April 25, 2024 | FCE On-Site | State | Title V Permits |
| January 31, 2023 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); Title V Permits |
| May 16, 2022 | FCE On-Site | State | Title V Permits |
| March 17, 2022 | PCE Off-Site | State | Title V Permits |
| July 14, 2020 | FCE On-Site | State | Title V Permits |
| July 12, 2018 | FCE On-Site | State | Title V Permits |
Violations
- 16Violation determinations since January 1, 2017
- 2Of them high-priority
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.
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| October 7, 2024 | Earliest FRV determination | State | Title V Permits |
| February 3, 2024 | HPV day-zero determination | State | MACT Standards (40 CFR Part 63) |
| January 31, 2024 | Earliest FRV determination | State | MACT Standards (40 CFR Part 63) |
| January 16, 2024 | Earliest FRV determination | State | Title V Permits |
| December 27, 2023 | Earliest FRV determination | State | Title V Permits |
| October 15, 2023 | Earliest FRV determination | State | Title V Permits |
| September 1, 2023 | Earliest FRV determination | State | MACT Standards (40 CFR Part 63) |
| August 9, 2023 | Earliest FRV determination | State | Title V Permits |
| August 1, 2023 | Earliest FRV determination | State | Title V Permits |
| July 11, 2023 | Earliest FRV determination | State | Title V Permits |
| May 25, 2023 | Earliest FRV determination | State | Title V Permits |
| May 22, 2023 | Earliest FRV determination | State | Title V Permits |
| May 19, 2023 | Earliest FRV determination | State | Title V Permits |
| March 4, 2023 | Earliest FRV determination | State | Title V Permits |
| September 1, 2021 | HPV day-zero determination | State | Title V Permits |
| July 29, 2021 | Earliest FRV determination | State | 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
| Date | What EPA recorded | Agency |
|---|---|---|
| October 17, 2024 | Notice of Violation | State |
| May 6, 2024 | Notice of Violation | State |
| March 30, 2023 | Notice of Violation | State |
| March 30, 2022 | Notice of Violation | State |
| October 18, 2021 | Notice of Violation | State |
Stack tests
- 19Stack tests since January 1, 2017
- 1Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| April 7, 2026 | Pass | State |
| March 16, 2026 | Pass | State |
| June 2, 2025 | Pass | State |
| May 8, 2025 | Pass | State |
| March 10, 2025 | Pass | State |
| March 25, 2024 | Pass | State |
| June 27, 2023 | Pass | State |
| April 1, 2023 | Pass | State |
| March 28, 2023 | Pass | State |
| March 15, 2022 | Pass | State |
| August 17, 2021 | Pass | State |
| June 2, 2021 | Fail | State |
| March 17, 2021 | Pass | State |
| March 15, 2021 | Pass | State |
| March 23, 2020 | Pass | State |
| June 10, 2019 | Pass | State |
| August 28, 2018 | Pass | State |
| August 10, 2017 | Pass | State |
| June 19, 2017 | Pass | State |
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 110000422043 there.
Nearby on the register
- Air-emissions sources in Marathon County
- Every source record in Marathon County, A to Z
- Air-emissions sources in Wisconsin
- Every source record in Wisconsin, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.