Clean Air Act stationary source · ICIS-AIR WI0000005502108152
DIDION MILLING INC., Cambria, WI: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Major sourceEmissions classification
- No Violation IdentifiedCurrent violation status, as filed
- 11Compliance evaluations since January 1, 2017
- 5High-priority violations since January 1, 2017
- 3Formal enforcement actions since January 1, 2017
DIDION MILLING INC., at 501 S WILLIAMS ST, Cambria in Columbia 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 “No Violation Identified”. 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 | DIDION MILLING INC. |
|---|---|
| ICIS-AIR ID | WI0000005502108152 |
| EPA facility registry ID | 110016877021 |
| Operating status | Operating |
| Emissions classification | Major source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | 501 S WILLIAMS ST, Cambria, WI 539239109 |
| County | Columbia County |
| In a nonattainment county | No (EPA Green Book) |
| Industry (NAICS) | Chemical manufacturing (NAICS 3251) |
| SIC code | 2041 |
| 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 DIDION MILLING INC. 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
- 11Evaluations since January 1, 2017
- 5Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| August 8, 2025 | FCE On-Site | State | Title V Permits |
| September 27, 2024 | FCE On-Site | State | Title V Permits |
| February 9, 2023 | PCE Off-Site | State | Title V Permits |
| August 25, 2022 | PCE Off-Site | State | Title V Permits |
| October 25, 2021 | PCE Off-Site | State | Title V Permits |
| August 19, 2021 | FCE On-Site | State | Title V Permits |
| June 17, 2020 | PCE Off-Site | State | New Source Performance Standards |
| July 29, 2019 | FCE On-Site | State | Title V Permits |
| May 29, 2019 | PCE Off-Site | State | Title V Permits |
| June 28, 2018 | PCE On-Site | U.S. EPA | MACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| September 27, 2017 | FCE On-Site | State | Title V Permits |
Violations
- 27Violation determinations since January 1, 2017
- 5Of 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 |
|---|---|---|---|
| August 8, 2025 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| September 27, 2024 | Earliest FRV determination | State | Title V Permits |
| January 27, 2023 | HPV day-zero determination | State | Title V Permits |
| August 25, 2022 | Earliest FRV determination | State | Title V Permits |
| October 19, 2021 | Earliest FRV determination | State | Title V Permits |
| August 20, 2021 | HPV day-zero determination | State | New Source Performance Standards; Title V Permits |
| August 20, 2021 | HPV day-zero determination | State | New Source Performance Standards; Title V Permits |
| August 19, 2021 | Earliest FRV determination | State | New Source Performance Standards; Title V Permits |
| August 19, 2021 | Earliest FRV determination | State | New Source Performance Standards; Title V Permits |
| October 1, 2020 | Earliest FRV determination | State | Title V Permits |
| May 21, 2020 | HPV day-zero determination | State | New Source Performance Standards |
| March 27, 2020 | Earliest FRV determination | State | New Source Performance Standards |
| August 22, 2019 | HPV day-zero determination | State | New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| May 13, 2019 | Earliest FRV determination | State | New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| May 17, 2017 | Earliest FRV determination | State | Title V Permits |
Enforcement and penalties
3 formal enforcement actions since January 1, 2017, 2 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.
| Date | What EPA recorded | Agency | Penalty, as filed |
|---|---|---|---|
| November 9, 2023 | Civil Judicial Action | State | $940,000 |
| June 21, 2023 | CAA 113D1 Action For Penalty | U.S. EPA | $170,000 |
| June 7, 2023 | CAA 113A Admin Compliance Order (Non-Penalty) | U.S. EPA | $0 |
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| September 26, 2025 | Warning Letter | State |
| January 27, 2025 | Warning Letter | State |
| March 14, 2023 | Notice of Violation | State |
| November 10, 2022 | Notice of Violation | State |
| November 16, 2021 | Notice of Violation | State |
| September 9, 2021 | Notice of Violation | State |
| February 15, 2021 | Notice of Violation | State |
| February 15, 2021 | Notice of Violation | State |
| June 17, 2020 | Notice of Violation | State |
| June 17, 2020 | Notice of Violation | State |
| June 17, 2020 | Notice of Violation | State |
| June 17, 2020 | Notice of Violation | State |
| June 17, 2020 | Notice of Violation | State |
| June 17, 2020 | Notice of Violation | State |
| June 17, 2020 | Notice of Violation | State |
| September 13, 2019 | Notice of Violation | State |
| February 25, 2019 | Notice of Violation | U.S. EPA |
| October 5, 2017 | Warning Letter | State |
Stack tests
- 6Stack tests since January 1, 2017
- 2Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| October 16, 2024 | Pass | State |
| October 17, 2023 | Pass | State |
| November 15, 2022 | Pass | State |
| November 18, 2020 | Fail | State |
| September 30, 2020 | Fail | State |
| November 28, 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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Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.