Clean Air Act stationary source · ICIS-AIR MT0000003011100012
CHS INC REFINERY LAUREL, Laurel, MT: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Major sourceEmissions classification
- No Violation IdentifiedCurrent violation status, as filed
- 6Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 2Formal enforcement actions since January 1, 2017
CHS INC REFINERY LAUREL, at PO BOX 909, Laurel in Yellowstone 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 “No Violation Identified”. Yellowstone 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 | CHS INC REFINERY LAUREL |
|---|---|
| ICIS-AIR ID | MT0000003011100012 |
| EPA facility registry ID | 110000595124 |
| Operating status | Operating |
| Emissions classification | Major source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | PO BOX 909, Laurel, MT 59044 |
| County | Yellowstone County |
| In a nonattainment county | Yes (EPA Green Book) |
| Industry (NAICS) | Petroleum and coal products manufacturing (NAICS 3241) |
| EPA region | 08 |
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 CHS INC REFINERY LAUREL 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
- 6Evaluations since January 1, 2017
- 3Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| January 22, 2026 | PCE Off-Site | U.S. EPA | New Source Performance Standards |
| September 24, 2024 | FCE On-Site | State | 40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; New Source Review Permit Requirements; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| September 30, 2021 | FCE On-Site | State | MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; New Source Review Permit Requirements; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| September 28, 2018 | FCE On-Site | State | 40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; New Source Review Permit Requirements; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| August 29, 2018 | PCE Off-Site | State | New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| November 9, 2017 | PCE Off-Site | State | New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
Violations
- 1Violation determinations since January 1, 2017
- 0Of 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 |
|---|---|---|---|
| November 22, 2017 | Earliest FRV determination | State | New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
Enforcement and penalties
2 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 |
|---|---|---|---|
| April 30, 2018 | Administrative Order | State | $177,950 |
| April 30, 2018 | Administrative Order | State | $177,950 |
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| February 5, 2018 | Notice of Violation | State |
Stack tests
- 311Stack tests since January 1, 2017
- 3Recorded as failed
The newest 50 of 311.
| Date | What EPA recorded | Agency |
|---|---|---|
| August 17, 2026 | Pass | State |
| August 13, 2026 | Pass | State |
| August 11, 2026 | Pass | State |
| August 5, 2026 | Pass | State |
| August 5, 2026 | Pass | State |
| August 5, 2026 | Pass | State |
| August 4, 2026 | Pass | State |
| August 4, 2026 | Fail | State |
| April 27, 2026 | Pass | State |
| April 27, 2026 | Pass | State |
| April 27, 2026 | Pass | State |
| April 27, 2026 | Pass | State |
| October 28, 2025 | Pass | State |
| October 28, 2025 | Pass | State |
| October 28, 2025 | Pass | State |
| October 10, 2025 | Pass | State |
| October 9, 2025 | Pass | State |
| October 9, 2025 | Pass | State |
| October 9, 2025 | Pass | State |
| October 9, 2025 | Pass | State |
| October 9, 2025 | Pass | State |
| September 2, 2025 | Pass | State |
| September 2, 2025 | Pass | State |
| August 22, 2025 | Pass | State |
| August 8, 2025 | Pass | State |
| August 8, 2025 | Pass | State |
| August 8, 2025 | Pass | State |
| August 6, 2025 | Pass | State |
| August 6, 2025 | Pass | State |
| August 6, 2025 | Pass | State |
| August 6, 2025 | Pass | State |
| August 4, 2025 | Pass | State |
| May 1, 2025 | Pass | State |
| May 1, 2025 | Pass | State |
| May 1, 2025 | Pass | State |
| May 1, 2025 | Pass | State |
| May 1, 2025 | Pass | State |
| November 7, 2024 | Pass | State |
| November 7, 2024 | Pass | State |
| November 7, 2024 | Pass | State |
| November 7, 2024 | Pass | State |
| November 6, 2024 | Pass | State |
| November 6, 2024 | Pass | State |
| November 6, 2024 | Pass | State |
| August 8, 2024 | Pass | State |
| August 8, 2024 | Pass | State |
| August 8, 2024 | Pass | State |
| August 8, 2024 | Pass | State |
| August 8, 2024 | Pass | State |
| August 8, 2024 | 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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Nearby on the register
- Air-emissions sources in Yellowstone County
- Every source record in Yellowstone County, A to Z
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- Every source record in Montana, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.