Velarion Records

Clean Air Act stationary source · ICIS-AIR WI0000005507300034

WI PUBLIC SERVICE WESTON POWER PLANT, Kronenwetter, WI: Clean Air Act compliance record, inspections, violations, penalties

WI PUBLIC SERVICE WESTON POWER PLANT, at 2491 OLD HWY 51, Kronenwetter in Marathon County, Wisconsin, 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”. Marathon 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 filedWI PUBLIC SERVICE WESTON POWER PLANT
ICIS-AIR IDWI0000005507300034
EPA facility registry ID110043779783
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)No Violation Identified
Address2491 OLD HWY 51, Kronenwetter, WI 54455
CountyMarathon County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Utilities (NAICS 2211)
SIC code4911
EPA region05

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 WI PUBLIC SERVICE WESTON POWER PLANT 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
August 3, 2026PCE Off-SiteStateTitle V Permits
August 3, 2026PCE Off-SiteStateTitle V Permits
March 13, 2026FCE On-SiteStateTitle V Permits
February 24, 2026PCE Off-SiteStateTitle V Permits
February 23, 2026PCE Off-SiteStateTitle V Permits
February 6, 2026PCE Off-SiteStateTitle V Permits
January 23, 2026PCE Off-SiteStateTitle V Permits
October 28, 2025PCE Off-SiteStateTitle V Permits
April 23, 2025PCE Off-SiteStateTitle V Permits
February 28, 2025PCE Off-SiteStateTitle V Permits
February 27, 2025PCE Off-SiteStateTitle V Permits
February 17, 2025PCE Off-SiteStateTitle V Permits
January 28, 2025PCE Off-SiteStateTitle V Permits
January 28, 2025PCE Off-SiteStateTitle V Permits
January 21, 2025PCE Off-SiteStateTitle V Permits
December 26, 2024PCE Off-SiteStateNew Source Review Permit Requirements
December 16, 2024PCE Off-SiteStateTitle V Permits
October 21, 2024PCE Off-SiteStateTitle V Permits
July 29, 2024PCE Off-SiteStatePrevention of Significant Deterioration of Air Quality
January 30, 2024FCE On-SiteStateTitle V Permits
December 21, 2023PCE Off-SiteStatePrevention of Significant Deterioration of Air Quality
May 26, 2023PCE Off-SiteStateTitle V Permits
January 11, 2023PCE Off-SiteStateNew Source Review Permit Requirements; Prevention of Significant Deterioration of Air Quality; Title V Permits
January 1, 2023PCE Off-SiteStateTitle V Permits
April 21, 2022FCE On-SiteStateTitle V Permits
April 1, 2022PCE Off-SiteStatePrevention of Significant Deterioration of Air Quality; Title V Permits
February 8, 2022PCE Off-SiteStatePrevention of Significant Deterioration of Air Quality; Title V Permits
May 1, 2021PCE Off-SiteStateNew Source Review Permit Requirements; Prevention of Significant Deterioration of Air Quality
June 19, 2020FCE On-SiteStateTitle V Permits
February 7, 2020PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
July 23, 2018PCE Off-SiteStateNew Source Review Permit Requirements; Prevention of Significant Deterioration of Air Quality
March 14, 2018FCE 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
December 27, 2024Earliest FRV determinationStateNew Source Review Permit Requirements
July 29, 2024Earliest FRV determinationStatePrevention of Significant Deterioration of Air Quality
January 17, 2024Earliest FRV determinationStateTitle V Permits
January 17, 2024Earliest FRV determinationStateTitle V Permits
December 21, 2023Earliest FRV determinationStatePrevention of Significant Deterioration of Air Quality
December 21, 2023Earliest FRV determinationStatePrevention of Significant Deterioration of Air Quality
May 26, 2023Earliest FRV determinationStateTitle V Permits
January 4, 2023Earliest FRV determinationStatePrevention of Significant Deterioration of Air Quality; Title V Permits
April 21, 2022Earliest FRV determinationStateTitle V Permits
February 14, 2022Earliest FRV determinationStatePrevention of Significant Deterioration of Air Quality
February 14, 2022Earliest FRV determinationStatePrevention of Significant Deterioration of Air Quality
May 3, 2021Earliest FRV determinationStateNew Source Review Permit Requirements
December 23, 2020Earliest FRV determinationStateTitle V Permits
April 7, 2020Earliest FRV determinationStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
November 14, 2019Earliest FRV determinationStateNew Source Review Permit Requirements; Title V Permits
November 14, 2019Earliest FRV determinationStateNew Source Review Permit Requirements
July 23, 2018Earliest FRV determinationStatePrevention of Significant Deterioration of Air Quality

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, 2025Warning LetterState
August 23, 2024Warning LetterState
February 5, 2024Warning LetterState
June 2, 2023Warning LetterState
February 1, 2023Notice of ViolationState
May 2, 2022Warning LetterState
February 21, 2022Warning LetterState
May 7, 2021Warning LetterState
January 11, 2021Warning LetterState
August 21, 2020Notice of ViolationState
February 7, 2020Warning LetterState
July 25, 2018Warning LetterState
July 25, 2018Warning LetterState

Stack tests

The newest 50 of 75.

DateWhat EPA recordedAgency
June 30, 2026PassState
June 29, 2026PassState
June 24, 2026PassState
June 23, 2026PassState
June 23, 2026PassState
June 22, 2026PassState
October 20, 2025PassState
October 20, 2025PassState
July 14, 2025PassState
July 14, 2025PassState
July 14, 2025PassState
July 14, 2025PassState
May 12, 2025PassState
May 12, 2025PassState
May 12, 2025PassState
May 12, 2025PassState
May 12, 2025PassState
November 5, 2024PassState
October 22, 2024PassState
July 22, 2024PassState
July 15, 2024PassState
July 15, 2024PassState
July 15, 2024PassState
July 15, 2024PassState
May 14, 2024PassState
May 13, 2024PassState
May 13, 2024PassState
May 13, 2024PassState
December 11, 2023PassState
October 23, 2023PassState
September 19, 2023PassState
July 10, 2023PassState
July 10, 2023PassState
July 10, 2023PassState
July 10, 2023PassState
July 10, 2023PassState
May 22, 2023PassState
May 22, 2023PassState
May 22, 2023PassState
May 22, 2023PassState
May 22, 2023PassState
October 11, 2022PassState
August 10, 2022PassState
August 9, 2022PassState
August 9, 2022PassState
July 12, 2022PassState
May 16, 2022PassState
May 16, 2022PassState
May 16, 2022PassState
October 12, 2021PassState

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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