Clean Air Act stationary source · ICIS-AIR OK0000004005100571

IRON HORSE MIDSTREAM LLC / BUFFALO COMPRESSOR STATION, Amber, OK: Clean Air Act compliance record, inspections, violations, penalties

OperatingOperating status
Synthetic minor sourceEmissions classification
No Violation IdentifiedCurrent violation status, as filed
13Compliance evaluations since January 1, 2017
0High-priority violations since January 1, 2017
1Formal enforcement actions since January 1, 2017

IRON HORSE MIDSTREAM LLC / BUFFALO COMPRESSOR STATION, at 0.2 MI SW OF E1290 RD/ N2890 RD JUNC, Amber in Grady County, Oklahoma, is an operating synthetic minor 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 filed	IRON HORSE MIDSTREAM LLC / BUFFALO COMPRESSOR STATION
ICIS-AIR ID	OK0000004005100571
EPA facility registry ID	110070255798
Operating status	Operating
Emissions classification	Synthetic minor source
Current violation status (ICIS-AIR high-priority violation field)	No Violation Identified
Address	0.2 MI SW OF E1290 RD/ N2890 RD JUNC, Amber, OK 73004
County	Grady County
In a nonattainment county	No (EPA Green Book)
Industry (NAICS)	Oil and gas extraction (NAICS 2111)
SIC code	1311
EPA region	06

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 IRON HORSE MIDSTREAM LLC / BUFFALO COMPRESSOR STATION 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

13Evaluations since January 1, 2017
1Full compliance evaluations

Date	What EPA recorded	Agency	Programs
March 20, 2024	FCE On-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 19, 2023	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
January 25, 2023	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
May 6, 2022	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
July 7, 2021	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 25, 2021	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
June 22, 2020	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
June 26, 2019	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
May 8, 2019	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 23, 2019	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 9, 2019	PCE On-Site Record/Report Review	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
July 31, 2018	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
July 12, 2018	PCE Off-Site	State	MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards

Violations

2Violation determinations since January 1, 2017
0Of them high-priority

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.

Date	What EPA recorded	Agency	Programs
August 22, 2025	Earliest FRV determination	State	New Source Performance Standards
June 18, 2024	Earliest FRV determination	State	State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards

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.

Date	What EPA recorded	Agency	Penalty, as filed
August 12, 2025	Administrative Order	State	$2,100

Informal enforcement

Date	What EPA recorded	Agency
July 24, 2024	Notice of Violation	State

Stack tests

26Stack tests since January 1, 2017
0Recorded as failed

Date	What EPA recorded	Agency
June 4, 2025	Pass	State
June 3, 2025	Pass	State
June 2, 2025	Pass	State
June 2, 2025	Pass	State
October 22, 2024	Pass	State
June 12, 2024	Pass	State
June 12, 2024	Pass	State
June 11, 2024	Pass	State
June 11, 2024	Pass	State
June 10, 2024	Pass	State
June 10, 2024	Pass	State
June 20, 2023	Pass	State
June 20, 2023	Pass	State
June 20, 2023	Pass	State
June 20, 2023	Pass	State
June 19, 2023	Pass	State
June 19, 2023	Pass	State
April 25, 2023	Pass	State
April 25, 2023	Pass	State
February 3, 2023	Pass	State
April 27, 2022	Pass	State
April 27, 2022	Pass	State
July 2, 2019	Pass	State
May 14, 2019	Pass	State
May 14, 2019	Pass	State
July 26, 2018	Pass	State

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 110070255798 there.

Nearby on the register

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

This page covers the Clean Air Act stationary source record for IRON HORSE MIDSTREAM LLC / BUFFALO COMPRESSOR STATION in Amber, OK, on the ICIS-AIR register. The page lists 13 Compliance evaluations since January 1, 2017, 0 High-priority violations since January 1, 2017, and 1 Formal enforcement actions since January 1, 2017. It records the operating status as Operating, the emissions classification as Synthetic minor source, and the current violation status as No Violation Identified.