ICIS-AIR LA0000002201900293

WESTLAKE PETROCHEMICALS LLC - POLY III, Sulphur, LA: Clean Air Act compliance record, inspections, violations, penalties

OperatingOperating status
Major sourceEmissions classification
No Violation IdentifiedCurrent violation status, as filed
5Compliance evaluations since January 1, 2017
0High-priority violations since January 1, 2017
4Formal enforcement actions since January 1, 2017

WESTLAKE PETROCHEMICALS LLC - POLY III is on EPA’s ICIS-AIR register at 900 HWY 108, Sulphur in Calcasieu County, Louisiana: operating status operating, emissions classification major source, current violation status “No Violation Identified”. Calcasieu County is on EPA’s Green Book list of areas that do not meet a national air quality standard.

What stands out

The newest of the 9 events on file is a formal enforcement action dated July 14, 2026.
Its events on file run from February 20, 2017 through July 14, 2026.
Of the 4 formal enforcement actions on file, 2 carry a filed penalty above zero. The largest on file is $750,000, filed October 26, 2022.
Of its 5 compliance evaluations on file, 4 are a full compliance evaluation.
The register holds 277 air-emissions sources in Calcasieu County, Louisiana.

Every line is computed by formula from the record’s stored figures; nothing is estimated.

Identity

Facility as filed	WESTLAKE PETROCHEMICALS LLC - POLY III
ICIS-AIR ID	LA0000002201900293
EPA facility registry ID	110043973509
Operating status	Operating
Emissions classification	Major source
Current violation status (HPV field)	No Violation Identified
Address	900 HWY 108, Sulphur, LA 70663
County	Calcasieu County
In a nonattainment county	Yes (EPA Green Book)
Industry (NAICS)	Chemical manufacturing (NAICS 3252)
SIC code	2821
EPA region	06

Programs and pollutants

The program, pollutant and Title V files are not loaded: what this page covers.

Compliance evaluations

5Evaluations since January 1, 2017
4Full compliance evaluations

Date	What EPA recorded	Agency	Programs
May 13, 2025	FCE On-Site	State	New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
September 29, 2021	FCE On-Site	State	New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 19, 2019	FCE On-Site	State	New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 29, 2018	PCE Off-Site	U.S. EPA	Federal Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
February 20, 2017	FCE On-Site	State	New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits

Violations

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

What high-priority and federally reportable violations mean.

EPA’s violation history file holds no violation for ICIS-AIR LA0000002201900293 since January 1, 2017.

Enforcement and penalties

2 of the formal enforcement actions carry a penalty filed above zero. How a penalty is shown.

Date	What EPA recorded	Agency	Penalty, as filed
July 14, 2026	Administrative Order	State	$26,000
April 25, 2024	Administrative Order	State	$0
October 26, 2022	Civil Judicial Action	U.S. EPA	$750,000
February 24, 2017	Administrative Order	State	$0

Informal enforcement

EPA’s informal action file holds no notice or warning for ICIS-AIR LA0000002201900293 since January 1, 2017.

Stack tests

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

EPA’s stack test file holds no test at ICIS-AIR LA0000002201900293 since January 1, 2017.

Watch WESTLAKE PETROCHEMICALS LLC - POLY III

Privacy

Free from EPA: Detailed Facility Report, ECHO Notify (registry ID 110043973509).

Other air sources in Louisiana beside WESTLAKE PETROCHEMICALS LLC - POLY III

EPA ICIS-AIR download, loaded September 14, 2026.