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Clean Air Act stationary source · ICIS-AIR IA0000001903300035

HEIDELBERG MATERIALS US CEMENT LLC, Mason City, IA: Clean Air Act compliance record, inspections, violations, penalties

HEIDELBERG MATERIALS US CEMENT LLC, at 700 25TH ST NW, Mason City in Cerro Gordo County, Iowa, 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”. 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 IDIA0000001903300035
EPA facility registry ID110072214417
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)Unaddressed-State
Address700 25TH ST NW, Mason City, IA 504019771
CountyCerro Gordo County
In a nonattainment countyNo (EPA Green Book)
Industry (NAICS)Nonmetallic mineral product manufacturing (NAICS 3273)
SIC code3241
EPA region07

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

DateWhat EPA recordedAgencyPrograms
March 10, 2025FCE On-SiteStateTitle V Permits
December 6, 2022FCE On-SiteU.S. EPAMACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
August 23, 2021FCE On-SiteStateTitle V Permits
July 30, 2019FCE On-SiteU.S. EPA40 CFR Part 63 Area Sources; New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
September 28, 2017FCE On-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
May 13, 2026HPV day-zero determinationStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
February 18, 2026HPV day-zero determinationU.S. EPAMACT Standards (40 CFR Part 63); CAANVCO; Title V Permits
February 3, 2026HPV day-zero determinationStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
August 14, 2025Earliest FRV determinationStateMACT Standards (40 CFR Part 63)
August 14, 2025Earliest FRV determinationState40 CFR Part 63 Area Sources
April 17, 2025Earliest FRV determinationStateMACT Standards (40 CFR Part 63); New Source Performance Standards
March 25, 2025HPV day-zero determinationStateMACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
January 9, 2025Earliest FRV determinationStateMACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
November 18, 2024HPV day-zero determinationStateMACT Standards (40 CFR Part 63)
May 6, 2024Earliest FRV determinationStateMACT Standards (40 CFR Part 63)
March 4, 2024HPV day-zero determinationStateMACT Standards (40 CFR Part 63)
January 18, 2024HPV day-zero determinationStatePrevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
October 27, 2021Earliest FRV determinationStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
December 3, 2019Earliest FRV determinationState40 CFR Part 63 Area Sources; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
March 4, 2019Earliest FRV determinationStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
November 6, 2017Earliest FRV determinationStateTitle V Permits
October 18, 2017Earliest FRV determinationStateTitle V Permits
October 18, 2017Earliest FRV 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
November 17, 2021CAA 113D1 Action For PenaltyU.S. EPA$197,500

Informal enforcement

DateWhat EPA recordedAgency
May 13, 2026Notice of ViolationState
February 3, 2026Notice of ViolationState
August 14, 2025Notice of ViolationState
August 14, 2025Notice of ViolationState
March 25, 2025Notice of ViolationState
February 21, 2025Notice of ViolationState
January 9, 2025Notice of ViolationState
November 18, 2024Notice of ViolationState
May 6, 2024Notice of ViolationState
March 4, 2024Notice of ViolationState
January 18, 2024Notice of ViolationState
October 27, 2021Notice of ViolationState
December 12, 2020Notice of ViolationState
December 3, 2019Notice of ViolationState
March 7, 2019Notice of ViolationState
November 6, 2017Notice of ViolationState
October 18, 2017Notice of ViolationState

Stack tests

The newest 50 of 77.

DateWhat EPA recordedAgency
May 20, 2026PassState
May 20, 2026FailState
May 19, 2026FailState
February 18, 2026FailState
February 17, 2026FailState
August 26, 2025PassState
July 23, 2025PassState
March 6, 2025PassState
February 27, 2025PassState
February 7, 2025PassState
October 9, 2024PassState
October 8, 2024PassState
August 28, 2024FailState
August 23, 2024FailState
August 22, 2024PassState
August 2, 2024PassState
August 1, 2024FailState
July 31, 2024FailState
June 28, 2024PassState
June 28, 2024PassState
June 10, 2024PassState
February 29, 2024PassState
February 29, 2024PassState
February 27, 2024PassState
January 5, 2024PassState
January 4, 2024PassState
January 3, 2024FailState
November 2, 2023PassState
November 1, 2023FailState
September 20, 2023PassState
September 20, 2023FailState
May 31, 2023PassState
May 31, 2023PassState
February 20, 2023PassState
February 20, 2023PassState
January 24, 2023PassState
December 14, 2022PassState
December 13, 2022PassState
June 17, 2022FailState
June 15, 2022FailState
May 4, 2022FailState
May 4, 2022PassState
May 3, 2022FailState
September 17, 2021PassState
July 31, 2021FailState
July 31, 2021PassState
June 24, 2021PassState
June 23, 2021PassState
June 22, 2021PassState
September 4, 2020PassState

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 110072214417 there.

Nearby on the register

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