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ICIS-AIR MT0000003011100011

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

BILLINGS REFINERY is on EPA’s ICIS-AIR register at 401 S 23RD ST, Billings in Yellowstone County, Montana: operating status operating, emissions classification major source, current violation status “No Violation Identified”. Yellowstone County is on EPA’s Green Book list of areas that do not meet a national air quality standard.

Identity

Facility as filedBILLINGS REFINERY
ICIS-AIR IDMT0000003011100011
EPA facility registry ID110043806085
Operating statusOperating
Emissions classificationMajor source
Current violation status (HPV field)No Violation Identified
Address401 S 23RD ST, Billings, MT 59101
CountyYellowstone County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Petroleum and coal products manufacturing (NAICS 3241)
EPA region08

Programs and pollutants

The program, pollutant and Title V files are not loaded: what this page covers.

Compliance evaluations

DateWhat EPA recordedAgencyPrograms
June 4, 2026PCE On-SiteU.S. EPANational Emission Standards for Hazardous Air Pollutants (40 CFR Part 61)
September 29, 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
September 26, 2022FCE On-SiteStateMACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
July 22, 2021PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
October 28, 2020PCE Off-SiteStateNew Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
July 14, 2020PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
November 15, 2019PCE Off-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 30, 2019FCE Off-SiteStateMACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 8, 2019PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
July 23, 2018PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 17, 2017PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits

Violations

What high-priority and federally reportable violations mean.

DateWhat EPA recordedAgencyPrograms
July 31, 2018Earliest FRV determinationStateNew Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 19, 2018Earliest FRV determinationStateNew Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 12, 2018Earliest FRV determinationStateNew Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 17, 2017Earliest FRV determinationStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits

Enforcement and penalties

1 of the formal enforcement actions carry a penalty filed above zero. How a penalty is shown.

DateWhat EPA recordedAgencyPenalty, as filed
April 8, 2019CAA 113D1 Action For PenaltyU.S. EPA$150,000

Informal enforcement

DateWhat EPA recordedAgency
November 20, 2019Warning LetterState
January 11, 2019Notice of ViolationState
July 31, 2018Notice of ViolationState
July 31, 2018Notice of ViolationState
March 17, 2017Warning LetterState

Stack tests

The newest 50 of 166.

DateWhat EPA recordedAgency
January 7, 2026PassState
December 4, 2025PassState
December 4, 2025PassState
December 4, 2025PassState
December 4, 2025PassState
December 4, 2025PassState
December 4, 2025PassState
December 4, 2025PassState
November 13, 2025PassState
October 28, 2025PassState
December 16, 2024PassState
December 16, 2024PassState
December 4, 2024PassState
December 2, 2024PassState
December 2, 2024PassState
December 2, 2024PassState
December 2, 2024FailState
November 4, 2024PassState
November 4, 2024PassState
November 4, 2024PassState
May 21, 2024PassState
May 21, 2024PassState
May 21, 2024PassState
May 21, 2024PassState
January 28, 2024PassState
January 22, 2024PassState
January 19, 2024PassState
January 12, 2024PassState
January 12, 2024PassState
January 12, 2024PassState
November 16, 2023PassState
November 2, 2023PassState
October 6, 2023PassState
February 7, 2023PassState
January 5, 2023PassState
January 5, 2023PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
December 27, 2022PassState
February 7, 2022PassState
February 4, 2022PassState

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Billing

Privacy

Free from EPA: Detailed Facility Report, ECHO Notify (registry ID 110043806085).

Other air sources in Montana beside BILLINGS REFINERY

EPA ICIS-AIR download, loaded September 14, 2026.