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Clean Air Act stationary source · ICIS-AIR SD0000004605101001

OTTER TAIL POWER COMPANY, Big Stone City, SD: Clean Air Act compliance record, inspections, violations, penalties

OTTER TAIL POWER COMPANY, at P. O. BOX 218, Big Stone City in Grant County, South Dakota, 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 filedOTTER TAIL POWER COMPANY
ICIS-AIR IDSD0000004605101001
EPA facility registry ID110011493437
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)No Violation Identified
AddressP. O. BOX 218, Big Stone City, SD 57216
CountyGrant County
In a nonattainment countyNo (EPA Green Book)
Industry (NAICS)Utilities (NAICS 2211)
SIC code4911
EPA region08

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 OTTER TAIL POWER COMPANY 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 12, 2026FCE On-SiteStateTitle V Permits
July 29, 2025FCE On-SiteStateTitle V Permits
August 14, 2024FCE On-SiteStateTitle V Permits
August 8, 2023FCE On-SiteStateTitle V Permits
August 3, 2022FCE On-SiteStateTitle V Permits
July 13, 2021FCE On-SiteStateTitle V Permits
September 11, 2020FCE On-SiteStateTitle V Permits
July 30, 2019FCE On-SiteStateTitle V Permits
August 21, 2018FCE On-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
August 8, 2017FCE On-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title 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 10, 2022Earliest FRV determinationStateTitle V Permits
April 26, 2022Earliest FRV determinationStateTitle V Permits
June 22, 2021Earliest FRV determinationStateTitle V Permits
July 29, 2020Earliest FRV determinationLocalTitle V Permits
August 31, 2018HPV day-zero determinationStateMACT Standards (40 CFR Part 63)

Enforcement and penalties

1 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.

DateWhat EPA recordedAgencyPenalty, as filed
June 4, 2019Administrative OrderState$0

Informal enforcement

EPA’s informal action file holds no notice or warning for ICIS-AIR SD0000004605101001 since January 1, 2017.

Stack tests

DateWhat EPA recordedAgency
June 16, 2026PassState
July 31, 2025PassState
July 30, 2025PassState
July 29, 2025PassState
February 5, 2025PassState
August 15, 2024PendingState
August 14, 2024PassState
August 13, 2024PassState
August 10, 2023PassState
August 10, 2023PassState
August 8, 2023PassState
August 4, 2022PassState
August 3, 2022PassState
August 2, 2022PassState
February 17, 2022PassState
August 5, 2021PassState
August 3, 2021PassState
August 24, 2020PassState
August 19, 2020PassState
August 18, 2020PassState
August 15, 2019PassState
August 14, 2019PassState
July 17, 2019PassState
February 12, 2019PassState
November 27, 2018PassState
August 24, 2018PassState
August 23, 2018PassState
August 22, 2018PassState
August 21, 2018PendingState
August 21, 2018PassState
May 10, 2018PassState
March 7, 2018PassState
March 6, 2018PassState
November 7, 2017PassState
August 9, 2017PassState
May 23, 2017PassState
March 15, 2017PassState
March 14, 2017PassState
March 14, 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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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 110011493437 there.

Nearby on the register

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

What this page shows

This public-records page covers the Clean Air Act compliance record for OTTER TAIL POWER COMPANY, an operating major source in Big Stone City, South Dakota, as filed on EPA's ICIS-AIR register, with its violation status listed as "No Violation Identified." The figures listed are 10 compliance evaluations since January 1, 2017, 1 high-priority violation since January 1, 2017, and an entry for formal enforcement actions since January 1, 2017, with the facility file as it stood on September 14, 2026.