Clean Air Act stationary source · ICIS-AIR MS0000002809500014
WESTLAKE CHEMICALS AND VINYLS LLC, Aberdeen, MS: 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
- 1High-priority violations since January 1, 2017
- 1Formal enforcement actions since January 1, 2017
WESTLAKE CHEMICALS AND VINYLS LLC, at 715 HIGHWAY 25 SOUTH, Aberdeen in Monroe County, Mississippi, 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 filed | WESTLAKE CHEMICALS AND VINYLS LLC |
|---|---|
| ICIS-AIR ID | MS0000002809500014 |
| EPA facility registry ID | 110012665990 |
| Operating status | Operating |
| Emissions classification | Major source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | 715 HIGHWAY 25 SOUTH, Aberdeen, MS 39730 |
| County | Monroe County |
| In a nonattainment county | No (EPA Green Book) |
| Industry (NAICS) | Chemical manufacturing (NAICS 3252) |
| EPA region | 04 |
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 AND VINYLS LLC 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
- 5Evaluations since January 1, 2017
- 4Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| September 25, 2024 | 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 |
| September 26, 2023 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| May 9, 2022 | 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 |
| September 24, 2020 | 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 |
| July 11, 2018 | 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
- 2Violation 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 |
|---|---|---|---|
| March 7, 2023 | HPV day-zero determination | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| March 6, 2023 | 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 |
|---|---|---|---|
| November 18, 2024 | Administrative Order | State | $340,000 |
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| October 26, 2023 | Notice of Violation | State |
| August 16, 2023 | Notice of Violation | State |
| March 6, 2023 | Notice of Violation | State |
Stack tests
- 92Stack tests since January 1, 2017
- 28Recorded as failed
The newest 50 of 92.
| Date | What EPA recorded | Agency |
|---|---|---|
| September 12, 2025 | Pass | State |
| September 12, 2025 | Pass | State |
| September 12, 2025 | Pass | State |
| September 12, 2025 | Pass | State |
| September 11, 2025 | Pass | State |
| September 11, 2025 | Pass | State |
| September 11, 2025 | Pass | State |
| September 11, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 10, 2025 | Pass | State |
| September 9, 2025 | Pass | State |
| September 9, 2025 | Pass | State |
| September 9, 2025 | Pass | State |
| September 9, 2025 | Pass | State |
| September 9, 2025 | Pass | State |
| September 9, 2025 | Pass | State |
| September 9, 2025 | Pass | State |
| September 9, 2025 | Pass | State |
| September 25, 2024 | Pass | State |
| September 25, 2024 | Pass | State |
| September 24, 2024 | Pass | State |
| September 24, 2024 | Pass | State |
| November 15, 2023 | Pass | State |
| November 15, 2023 | Pass | State |
| September 7, 2023 | Pass | State |
| September 7, 2023 | Pass | State |
| September 6, 2023 | Fail | State |
| September 6, 2023 | Fail | State |
| September 6, 2023 | Pass | State |
| September 6, 2023 | Pass | State |
| June 9, 2023 | Fail | State |
| June 9, 2023 | Fail | State |
| June 9, 2023 | Fail | State |
| June 9, 2023 | Fail | State |
| June 9, 2023 | Fail | State |
| June 9, 2023 | 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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Nearby on the register
- Air-emissions sources in Monroe County
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- Every source record in Mississippi, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.