Clean Air Act stationary source · ICIS-AIR OK0000004009700008

LSB CHEMICAL LLC / PRYOR CHEMICAL, Pryor, OK: Clean Air Act compliance record, inspections, violations, penalties

OperatingOperating status
Major sourceEmissions classification
Violation w/in 1 YearCurrent violation status, as filed
73Compliance evaluations since January 1, 2017
1High-priority violations since January 1, 2017
5Formal enforcement actions since January 1, 2017

LSB CHEMICAL LLC / PRYOR CHEMICAL, at 4463 HUNT ST, Pryor in Mayes County, Oklahoma, 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 “Violation w/in 1 Year”. 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	LSB CHEMICAL LLC / PRYOR CHEMICAL
ICIS-AIR ID	OK0000004009700008
EPA facility registry ID	110000598531
Operating status	Operating
Emissions classification	Major source
Current violation status (ICIS-AIR high-priority violation field)	Violation w/in 1 Year
Address	4463 HUNT ST, Pryor, OK 74362
County	Mayes County
In a nonattainment county	No (EPA Green Book)
Industry (NAICS)	Chemical manufacturing (NAICS 3253)
SIC code	2873
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 LSB CHEMICAL LLC / PRYOR CHEMICAL 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

73Evaluations since January 1, 2017
5Full compliance evaluations

The newest 50 of 73.

Date	What EPA recorded	Agency	Programs
June 27, 2025	FCE On-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 28, 2023	FCE On-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 21, 2023	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 1, 2023	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 25, 2023	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
October 18, 2022	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
August 23, 2022	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 22, 2022	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 13, 2022	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 2, 2022	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 12, 2022	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 10, 2022	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
September 8, 2021	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
September 8, 2021	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 25, 2021	FCE On-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 8, 2021	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 30, 2021	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 30, 2021	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 30, 2021	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 20, 2021	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 20, 2021	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 13, 2021	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
December 2, 2020	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
November 30, 2020	PCE Off-Site	U.S. EPA	Prevention of Accidental Release/General Duty Clause; Risk Management Program
November 4, 2020	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
September 1, 2020	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
May 29, 2020	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 30, 2020	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 26, 2020	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 17, 2020	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 7, 2020	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
December 10, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
November 7, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
September 4, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
July 8, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 6, 2019	FCE On-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
May 7, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 11, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 4, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 14, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 14, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 14, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 5, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 3, 2019	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
December 4, 2018	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
November 30, 2018	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
August 22, 2018	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
August 14, 2018	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
May 18, 2018	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 22, 2018	PCE Off-Site	State	40 CFR Part 63 Area Sources; National Emission Standards for Hazardous Air Pollutants (40 CFR Part 61); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits

Violations

5Violation determinations since January 1, 2017
1Of 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
December 2, 2025	Earliest FRV determination	State	Title V Permits
June 26, 2020	Earliest FRV determination	State	Title V Permits
September 4, 2019	Earliest FRV determination	State	Title V Permits
March 15, 2018	HPV day-zero determination	State	New Source Performance Standards; Title V Permits
June 15, 2017	Earliest FRV determination	State	State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards

Enforcement and penalties

5 formal enforcement actions since January 1, 2017, 3 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
July 19, 2021	CAA 113D1 Action For Penalty	U.S. EPA	$38,000
July 16, 2021	CAA 113A Admin Compliance Order (Non-Penalty)	U.S. EPA	$0
March 3, 2017	Administrative Order	State	$5,250
January 12, 2017	CAA 113A Admin Compliance Order (Non-Penalty)	U.S. EPA	$0
January 12, 2017	CAA 113D1 Action For Penalty	U.S. EPA	$37,500

Informal enforcement

Date	What EPA recorded	Agency
December 3, 2025	Notice of Violation	State
February 26, 2020	Notice of Violation	State
June 25, 2018	Notice of Violation	State

Stack tests

4Stack tests since January 1, 2017
0Recorded as failed

Date	What EPA recorded	Agency
November 17, 2020	Pass	State
January 28, 2020	Pass	State
December 12, 2019	Pass	State
December 10, 2019	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 110000598531 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 LSB CHEMICAL LLC / PRYOR CHEMICAL in Pryor, OK, on the ICIS-AIR register. It lists a Major source emissions classification and a current violation status of Violation w/in 1 Year. The figures listed are 73 compliance evaluations, 1 high-priority violations and 5 formal enforcement actions since January 1, 2017.