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Clean Air Act stationary source · ICIS-AIR MT0000003011100013

PAR MONTANA BILLINGS REFINERY, Billings, MT: Clean Air Act compliance record, inspections, violations, penalties

PAR MONTANA BILLINGS REFINERY, at 700 PAR MONTANA RD, Billings 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 filedPAR MONTANA BILLINGS REFINERY
ICIS-AIR IDMT0000003011100013
EPA facility registry ID110000428421
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)No Violation Identified
Address700 PAR MONTANA RD, Billings, MT 59101
CountyYellowstone County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Petroleum and coal products manufacturing (NAICS 3241)
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 PAR MONTANA BILLINGS REFINERY 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
September 20, 2023FCE On-SiteStateMACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
September 17, 2020FCE 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
October 2, 2019PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 20, 2019PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
October 25, 2017PCE Off-SiteStateMACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
August 7, 2017FCE On-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 1, 2017PCE Off-SiteStateMACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); 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
October 10, 2019Earliest FRV determinationStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 1, 2018Earliest FRV determinationStateNew Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
August 21, 2017Earliest FRV determinationStateMACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 14, 2017Earliest FRV determinationStateMACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); 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
January 7, 2020Notice of ViolationState
March 21, 2019Notice of ViolationState
October 25, 2017Warning LetterState
May 30, 2017Warning LetterState

Stack tests

The newest 50 of 57.

DateWhat EPA recordedAgency
August 13, 2026PassState
August 13, 2026PassState
August 13, 2026PassState
February 17, 2026PassState
January 29, 2026PassState
August 13, 2025PassState
August 13, 2025PassState
August 6, 2025PassState
August 6, 2025PassState
August 6, 2025PassState
August 6, 2025PassState
August 6, 2025PassState
December 11, 2024PassState
November 19, 2024PassState
July 31, 2024PassState
July 22, 2024PassState
May 31, 2024PassState
May 31, 2024PassState
May 30, 2024PassState
February 13, 2024PassState
October 12, 2023PassState
July 25, 2023PassState
June 22, 2023PassState
June 22, 2023PassState
June 22, 2023PassState
January 5, 2023PassState
September 15, 2022PassState
July 21, 2022PassState
July 21, 2022PassState
June 1, 2022PassState
March 23, 2022PassState
December 30, 2021PassState
June 4, 2021PassState
June 4, 2021PassState
June 4, 2021PassState
January 12, 2021PassState
December 18, 2020PassState
June 26, 2020PassState
June 25, 2020PassState
June 25, 2020PassState
January 29, 2020PassState
January 27, 2020PassState
December 3, 2019PassState
October 8, 2019PassState
June 28, 2019PassState
June 28, 2019PassState
June 28, 2019PassState
September 14, 2018PassState
July 23, 2018PassState
July 23, 2018PassState

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 110000428421 there.

Nearby on the register

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