Velarion Records

Clean Air Act stationary source · ICIS-AIR ME0000002301300004

HEIDELBERG MATERIALS US CEMENT LLC, Thomaston, ME: Clean Air Act compliance record, inspections, violations, penalties

HEIDELBERG MATERIALS US CEMENT LLC, at 107 NEW COUNTY RD (US RT 1), Thomaston in Knox County, Maine, 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 “Unaddressed-State”. Knox 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 filedHEIDELBERG MATERIALS US CEMENT LLC
ICIS-AIR IDME0000002301300004
EPA facility registry ID110000581521
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)Unaddressed-State
Address107 NEW COUNTY RD (US RT 1), Thomaston, ME 04861
CountyKnox County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Nonmetallic mineral product manufacturing (NAICS 3273)
SIC code3241
EPA region01

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 HEIDELBERG MATERIALS US CEMENT LLC 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 120.

DateWhat EPA recordedAgencyPrograms
April 10, 2026PCE Off-SiteStateTitle V Permits
April 10, 2026PCE Off-SiteStateTitle V Permits
January 5, 2026PCE Off-SiteStateTitle V Permits
January 5, 2026PCE Off-SiteStateTitle V Permits
January 5, 2026PCE Off-SiteStateMACT Standards (40 CFR Part 63)
January 5, 2026PCE Off-SiteStateMACT Standards (40 CFR Part 63)
January 5, 2026PCE Off-SiteStateTitle V Permits
October 14, 2025PCE Off-SiteStateTitle V Permits
October 14, 2025PCE Off-SiteStateTitle V Permits
July 25, 2025PCE Off-SiteStateTitle V Permits
July 25, 2025PCE Off-SiteStateMACT Standards (40 CFR Part 63)
July 25, 2025PCE Off-SiteStateMACT Standards (40 CFR Part 63)
July 11, 2025PCE Off-SiteStateTitle V Permits
July 11, 2025PCE Off-SiteStateTitle V Permits
April 11, 2025PCE Off-SiteStateTitle V Permits
April 11, 2025PCE Off-SiteStateTitle V Permits
January 21, 2025PCE Off-SiteStateMACT Standards (40 CFR Part 63)
January 21, 2025PCE Off-SiteStateMACT Standards (40 CFR Part 63)
January 8, 2025PCE Off-SiteStateTitle V Permits
January 8, 2025PCE Off-SiteStateTitle V Permits
January 8, 2025PCE Off-SiteStateTitle V Permits
October 1, 2024PCE Off-SiteStateTitle V Permits
October 1, 2024PCE Off-SiteStateTitle V Permits
July 15, 2024PCE Off-SiteStateTitle V Permits
July 15, 2024PCE Off-SiteStateTitle V Permits
July 15, 2024PCE Off-SiteStateTitle V Permits
July 15, 2024PCE Off-SiteStateMACT Standards (40 CFR Part 63)
July 15, 2024PCE Off-SiteStateMACT Standards (40 CFR Part 63)
May 30, 2024FCE On-SiteStateTitle V Permits
April 15, 2024PCE Off-SiteStateTitle V Permits
April 15, 2024PCE Off-SiteStateTitle V Permits
January 24, 2024PCE Off-SiteStateMACT Standards (40 CFR Part 63)
January 24, 2024PCE Off-SiteStateTitle V Permits
January 19, 2024PCE Off-SiteStateMACT Standards (40 CFR Part 63)
January 12, 2024PCE Off-SiteStateTitle V Permits
January 5, 2024PCE Off-SiteStateTitle V Permits
October 27, 2023PCE Off-SiteStateTitle V Permits
October 2, 2023PCE Off-SiteStateTitle V Permits
July 19, 2023PCE Off-SiteStateMACT Standards (40 CFR Part 63)
July 19, 2023PCE Off-SiteStateMACT Standards (40 CFR Part 63)
July 14, 2023PCE Off-SiteStateTitle V Permits
July 7, 2023PCE Off-SiteStateTitle V Permits
June 22, 2023PCE Off-SiteStateTitle V Permits
March 8, 2023PCE Off-SiteStateTitle V Permits
January 27, 2023PCE Off-SiteStateTitle V Permits
January 26, 2023PCE Off-SiteStateMACT Standards (40 CFR Part 63)
January 26, 2023PCE Off-SiteStateMACT Standards (40 CFR Part 63)
January 24, 2023PCE Off-SiteStateMACT Standards (40 CFR Part 63)
January 23, 2023PCE Off-SiteStateTitle V Permits
January 4, 2023PCE 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
August 1, 2025Earliest FRV determinationStateMACT Standards (40 CFR Part 63)
December 31, 2022Earliest FRV determinationStateTitle V Permits
October 12, 2020HPV day-zero determinationStateTitle V Permits
March 17, 2017HPV day-zero determinationStateTitle V Permits

Enforcement and penalties

1 formal enforcement actions since January 1, 2017, 1 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
July 13, 2020Administrative OrderState$66,937

Informal enforcement

DateWhat EPA recordedAgency
June 26, 2025Warning LetterState
May 23, 2023Warning LetterState
November 9, 2021Warning LetterState
September 2, 2021Warning LetterState
November 17, 2020Notice of ViolationState
July 16, 2020Warning LetterState
May 5, 2017Notice of ViolationState

Stack tests

DateWhat EPA recordedAgency
October 24, 2024PassState
April 19, 2023PassState
April 19, 2023PassState
April 17, 2023PassState
June 24, 2022PassState
May 24, 2022PassState
May 24, 2022PassState
May 23, 2022PassState
August 24, 2021PassState
August 24, 2021PassState
June 24, 2021PassState
June 23, 2021PassState
June 22, 2021PassState
June 21, 2021PassState
August 31, 2020PassState
August 31, 2020PassState
August 27, 2020PassState
June 5, 2020PassState
June 5, 2020PassState
June 4, 2020PassState
April 28, 2020FailState
April 21, 2020PassState
September 24, 2019PassState
August 14, 2019PassState
August 12, 2019PassState
June 27, 2019PassState
June 26, 2019PassState
June 6, 2019PassState
June 5, 2019PassState
June 27, 2018PassState
June 14, 2018PassState
June 12, 2018PassState
June 12, 2018PassState
December 14, 2017PassState
November 28, 2017PassState
November 28, 2017PassState
August 30, 2017PassState
June 21, 2017PassState
June 20, 2017PendingState
May 10, 2017PassState
May 9, 2017PendingState
May 9, 2017PendingState

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

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

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