Clean Air Act stationary source · ICIS-AIR LA0000002204700002
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY, Plaquemine, LA: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Major sourceEmissions classification
- No Violation IdentifiedCurrent violation status, as filed
- 4Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 5Formal enforcement actions since January 1, 2017
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY, at 26100 HWY 405, Plaquemine in Iberville County, Louisiana, 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”. Iberville 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 filed | WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY |
|---|---|
| ICIS-AIR ID | LA0000002204700002 |
| EPA facility registry ID | 110000613747 |
| Operating status | Operating |
| Emissions classification | Major source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | 26100 HWY 405, Plaquemine, LA 70764 |
| County | Iberville County |
| In a nonattainment county | Yes (EPA Green Book) |
| Industry (NAICS) | Chemical manufacturing (NAICS 3251) |
| SIC code | 2821 |
| 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 WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY 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
- 4Evaluations since January 1, 2017
- 4Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| August 7, 2025 | 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; Title V Permits |
| August 3, 2021 | 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; Title V Permits |
| March 27, 2019 | FCE On-Site | State | 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 29, 2017 | FCE On-Site | State | 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 |
Violations
- 0Violation 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.
EPA’s violation history file holds no violation for ICIS-AIR LA0000002204700002 since January 1, 2017.
Enforcement and penalties
5 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 |
|---|---|---|---|
| May 16, 2025 | Administrative Order | State | $0 |
| March 6, 2024 | Administrative Order | State | $0 |
| May 6, 2020 | Administrative Order | State | $149,451 |
| November 8, 2018 | Administrative Order | State | $0 |
| March 7, 2017 | Administrative Order | State | $0 |
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| August 24, 2026 | Warning Letter | State |
| July 8, 2026 | Warning Letter | State |
| March 24, 2023 | Warning Letter | State |
| December 16, 2022 | Warning Letter | State |
| October 31, 2022 | Warning Letter | State |
| June 10, 2022 | Warning Letter | State |
| June 23, 2021 | Warning Letter | State |
| December 9, 2020 | Warning Letter | State |
| September 28, 2018 | Warning Letter | State |
Stack tests
- 1Stack tests since January 1, 2017
- 1Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| April 27, 2017 | Fail | 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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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 110000613747 there.
Nearby on the register
- Air-emissions sources in Iberville County
- Every source record in Iberville County, A to Z
- Air-emissions sources in Louisiana
- Every source record in Louisiana, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.