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Clean Air Act stationary source · ICIS-AIR AK0000000218500050

HILCORP ALASKA, LLC / MILNE POINT PRODUCTION FACILITY (MPU), North Slope Borough, AK: Clean Air Act compliance record, inspections, violations, penalties

HILCORP ALASKA, LLC / MILNE POINT PRODUCTION FACILITY (MPU), at MILNE POINT 1, North Slope Borough in North Slope County, Alaska, 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 filedHILCORP ALASKA, LLC / MILNE POINT PRODUCTION FACILITY (MPU)
ICIS-AIR IDAK0000000218500050
EPA facility registry ID110064404700
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)No Violation Identified
AddressMILNE POINT 1, North Slope Borough, AK 99734
CountyNorth Slope County
In a nonattainment countyNo (EPA Green Book)
Industry (NAICS)Oil and gas extraction (NAICS 2111)
EPA region10

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 HILCORP ALASKA, LLC / MILNE POINT PRODUCTION FACILITY (MPU) 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

The newest 50 of 60.

DateWhat EPA recordedAgencyPrograms
August 17, 2026PCE Off-SiteStateTitle V Permits
August 17, 2026PCE Off-SiteStateTitle V Permits
June 29, 2026PCE Off-SiteStateTitle V Permits
June 29, 2026PCE Off-SiteStateTitle V Permits
June 29, 2026PCE Off-SiteStateTitle V Permits
June 29, 2026PCE Off-SiteStateTitle V Permits
February 17, 2026PCE Off-SiteStateTitle V Permits
February 17, 2026PCE Off-SiteStateTitle V Permits
November 24, 2025PCE Off-SiteStateTitle V Permits
November 24, 2025PCE Off-SiteStateTitle V Permits
August 7, 2025PCE Off-SiteStateTitle V Permits
August 7, 2025PCE Off-SiteStateTitle V Permits
August 7, 2025PCE Off-SiteStateTitle V Permits
July 8, 2025PCE Off-SiteStateTitle V Permits
July 8, 2025PCE Off-SiteStateTitle V Permits
March 17, 2025FCE On-SiteStateTitle V Permits
February 18, 2025PCE Off-SiteStateTitle V Permits
February 18, 2025PCE Off-SiteStateTitle V Permits
November 18, 2024PCE Off-SiteStateTitle V Permits
November 18, 2024PCE Off-SiteStateTitle V Permits
August 29, 2024PCE Off-SiteStateTitle V Permits
August 29, 2024PCE Off-SiteStateTitle V Permits
May 31, 2024PCE Off-SiteStateTitle V Permits
May 31, 2024PCE Off-SiteStateTitle V Permits
March 22, 2024PCE Off-SiteStateTitle V Permits
March 22, 2024PCE Off-SiteStateTitle V Permits
March 22, 2024PCE Off-SiteStateTitle V Permits
March 21, 2024PCE Off-SiteStateTitle V Permits
August 11, 2023PCE Off-SiteStateTitle V Permits
May 3, 2023PCE Off-SiteStateTitle V Permits
March 1, 2023PCE Off-SiteStateTitle V Permits
January 17, 2023PCE Off-SiteStateTitle V Permits
January 11, 2023FCE On-SiteStateTitle V Permits
August 5, 2022PCE Off-SiteStateTitle V Permits
May 24, 2022PCE Off-SiteStateTitle V Permits
February 20, 2022PCE Off-SiteStateTitle V Permits
November 19, 2021PCE Off-SiteStateTitle V Permits
August 20, 2021PCE Off-SiteStateTitle V Permits
April 23, 2021FCE Off-SiteStateTitle V Permits
March 11, 2021PCE Off-SiteStateTitle V Permits
March 11, 2021PCE Off-SiteStateTitle V Permits
February 9, 2021PCE Off-SiteStateTitle V Permits
February 8, 2021PCE Off-SiteStateTitle V Permits
August 3, 2020PCE Off-SiteStateTitle V Permits
May 14, 2020PCE Off-SiteStateTitle V Permits
February 5, 2020PCE Off-SiteStateTitle V Permits
September 25, 2019FCE On-SiteStateTitle V Permits
August 21, 2019PCE Off-SiteStateTitle V Permits
July 17, 2019PCE On-Site Monitoring/SamplingU.S. EPANew Source Performance Standards
June 7, 2019PCE Off-SiteStateTitle 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
March 10, 2025Earliest FRV determinationStateTitle V Permits
August 29, 2024Earliest FRV determinationStateTitle V Permits
July 12, 2024Earliest FRV determinationStateTitle V Permits
July 12, 2024Earliest FRV determinationStateTitle V Permits
May 13, 2024Earliest FRV determinationStateTitle V Permits
April 26, 2024Earliest FRV determinationStateTitle V Permits
April 2, 2024Earliest FRV determinationStateTitle V Permits
March 1, 2024Earliest FRV determinationStateTitle V Permits
January 5, 2023Earliest FRV determinationStateTitle V Permits
November 13, 2020HPV day-zero determinationState40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; Title V Permits
August 22, 2019Earliest FRV determinationStateTitle V Permits
June 7, 2019Earliest FRV determinationStateTitle 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.

DateWhat EPA recordedAgencyPenalty, as filed
March 4, 2022Administrative OrderState$141,597
February 28, 2022CAA 113D1 Action For PenaltyU.S. EPA$180,580

Informal enforcement

DateWhat EPA recordedAgency
December 29, 2025Warning LetterState
December 5, 2025Warning LetterState
November 14, 2025Warning LetterState
August 8, 2025Warning LetterState
July 18, 2025Warning LetterState
March 19, 2025Warning LetterState
August 30, 2024Warning LetterState
August 16, 2024Warning LetterState
July 15, 2024Warning LetterState
July 15, 2024Warning LetterState
June 4, 2024Warning LetterState
May 30, 2024Warning LetterState
May 17, 2024Warning LetterState
March 1, 2024Warning LetterState
October 22, 2021Notice of ViolationState
April 16, 2020Notice of ViolationU.S. EPA
October 16, 2019Warning LetterState
September 25, 2019Warning LetterState
September 28, 2017Warning LetterState

Stack tests

DateWhat EPA recordedAgency
October 19, 2025FailState
May 14, 2024PassState
November 17, 2023PassState
November 16, 2023PassState
September 17, 2023PassState
June 14, 2023PassState
January 21, 2023PassState
September 17, 2021PassState
September 18, 2020PassState
October 21, 2019PassState
October 23, 2018FailState
July 2, 2018PassState
July 1, 2018PassState
July 1, 2018PassState
December 15, 2017PassState
October 15, 2017PassState

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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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 110064404700 there.

Nearby on the register

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