EPA TRI Facility · Chemicals
Westlake Chemicals & Vinyls LLC
Aberdeen, MS · Parent: Westlake Corp
- Total releases
- 138.7K lbs
- Chemicals reported
- 10
- Carcinogens
- 3
- Primary pathway
- Air Releases
AIR Form-R mix
Westlake Chemicals & Vinyls LLC: how the 138.7K lbs splits
138.7K lbs across all reported pathways
- Air Releases 138.1K lbs 99.5%
- Off-site Transfers 642 lbs 0.5%
Westlake Chemicals & Vinyls LLC's 138.7K lbs Form-R total is AIR - air releases is 99.5% of the bar. Next segment: off-site transfers at 0.5%. Leading chemical by pounds: Vinyl chloride.
Carcinogen-classified pounds vs other reported pounds
Same cumulative TRI total as above, split by EPA/IARC carcinogen classification on each chemical: pounds share, not chemical count. Classification is not a site health-risk score.
MID volume AIR pathway CARC-HEAVY
Westlake Chemicals & Vinyls LLC is an EPA Toxics Release Inventory reporter in Aberdeen, MS, in the chemicals sector. It reported 14.4K lbs of releases across 9 chemicals in 2023, and 138.7K lbs in total across its 2019-2023 reporting years. That ranks 3,901 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Mississippi's 328 reporting TRI sites, pounds #1 is not chemical-count #1. Westlake Chemicals & Vinyls LLC is pounds #77 and chemical-count #25 at 138.7K lbs. Tronox LLC leads reported pounds (64.0M lbs) at 17 chemicals (chemical-count #12). Chevron Products Co Pascagoula Refinery leads chemical count at 46 chemicals (7.4M lbs, pounds #9). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Sterling Specialty Chemicals US LLC; Westlake Compounds LLC; Tronox LLC; True Temper Sports Inc. Similar-scale Chemicals peers outside Mississippi: Chemical Products Corp; Turf Care Supply-Hatfield Plant; Polynt Composites USA Inc.; Carboline Global Inc.. Other Westlake Corp sites in this extract: Westlake Longview Corp; Westlake US 2 LLC; Westlake Polymers LLC; Westlake Vinyls Inc. Largest disclosed chemicals by pounds: Vinyl chloride; Methanol; Phthalic anhydride; Chlorine.
Westlake Chemicals & Vinyls LLC stamps MID volume with a dominant AIR pathway (99.5% air releases) across 10 chemicals · 3 carcinogen-classified. Cumulative Form-R extract: 138.7K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Chemical Products Corp and Turf Care Supply-Hatfield Plant.
Westlake Chemicals & Vinyls LLC vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
139K lbs Top 15% higher than 85% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Westlake Chemicals & Vinyls LLC: Vinyl chloride-led volume
Among the 3,917 Chemicals facilities in this database, Westlake Chemicals & Vinyls LLC reports the 751st-largest volume, placing it in the top 19.2% of its sector. Its reported volume is concentrated rather than spread: Vinyl chloride alone is 73.4% of the total. Carcinogen-classified chemicals make up 73.4% of the reported pounds, not just of the chemical count. Scale peers outside Mississippi include Chemical Products Corp and Turf Care Supply-Hatfield Plant.
Concentrated means ≥60% of Westlake Chemicals & Vinyls LLC's pounds in one chemical - here Vinyl chloride at 73.4%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Westlake Chemicals & Vinyls LLC's total reported releases fell from 73.2 thousand lb in 2022 to 14.4 thousand lb in 2023, based on EPA TRI filings.
- Westlake Chemicals & Vinyls LLC's off-site transfers rose from 0 lb in 2022 to 621 lb in 2023, based on EPA TRI filings.
- Westlake Chemicals & Vinyls LLC's air releases fell from 73.2 thousand lb in 2022 to 13.8 thousand lb in 2023, based on EPA TRI filings.
Westlake Chemicals & Vinyls LLC Form-R facts
Compare this facility
See how Westlake Chemicals & Vinyls LLC stacks up against nearby facilities and the typical reporter.
3.8× more than the comparison
3.3× more than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Westlake Chemicals & Vinyls LLC releases toxic chemicals into the environment. Total: 138.7K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 24% (18.9K lbs to 14.4K lbs).
Westlake Chemicals & Vinyls LLC: annual Form-R pounds
MID site · AIR pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Westlake Chemicals & Vinyls LLC year-over-year reported totals (decreased by 24% from 2019 to 2023). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: Vinyl chloride.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 18.9K lbs | 9 |
| 2020 | 18.0K lbs | 9 |
| 2021 | 14.2K lbs | 9 |
| 2022 | 73.2K lbs | 9 |
| 2023 | 14.4K lbs | 9 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 3 of 10 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Vinyl chloride | 101.8K lbs | Carcinogen |
| Methanol | 13.1K lbs | - |
| Phthalic anhydride | 10.9K lbs | - |
| Chlorine | 6.2K lbs | - |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 6.0K lbs | - |
| Antimony compounds | 632 lbs | - |
| Dioxin and dioxin-like compounds | 0 lbs | Carcinogen |
| Cumene | 0 lbs | Carcinogen |
| Zinc compounds | 0 lbs | - |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0 lbs | - |
Westlake Chemicals & Vinyls LLC · AIR-pathway site
Nearest TRI Facilities to Westlake Chemicals & Vinyls LLC
Closest other reporters in Mississippi - including Sterling Specialty Chemicals US LLC, Westlake Compounds LLC, Tronox LLC, ordered by distance.
Showing 8 of 327 other reporting facilities in Mississippi.
Similar Chemicals Facilities
Other Chemicals facilities with similar total release volumes (±80%), outside Mississippi - e.g. Chemical Products Corp, Turf Care Supply-Hatfield Plant, Polynt Composites USA Inc..
Compare beyond Mississippi
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Westlake Chemicals & Vinyls LLC on cumulative reported pounds (138.7K lbs) and distinct chemical count (10). Release-pound peers include Univar Solutions USA, Manchester Tank & Equipment, Zentis North American Operating LLC. Chemical-count peers include Harris Paints Corp., Saint Thomas Bulk Terminal, Total Guaynabo Bulk Terminal. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Westlake Corp Facilities
Same-parent TRI sites ranked by reported releases - including Westlake Longview Corp, Westlake US 2 LLC, Westlake Polymers LLC.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include Vinyl chloride, Methanol, Phthalic anhydride, Chlorine; nearby reporters include Sterling Specialty Chemicals US LLC. Westlake Chemicals & Vinyls LLC stamps MID volume · AIR pathway · CARC-HEAVY carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Westlake Chemicals & Vinyls LLC TRI extract (MID · AIR · CARC-HEAVY · lead Vinyl chloride) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Westlake Chemicals & Vinyls LLC totals are self-reported EPCRA §313 estimates for Aberdeen, MS, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 325211 · Chemicals. 0.2% of Monroe TRI pounds in this extract. Nearest ABS peer: Univar Solutions USA (Δ 71 lbs). Pounds ≠ exposure.
Westlake Chemicals & Vinyls LLC stamps MID volume · AIR pathway · CARC-HEAVY · lead Vinyl chloride. PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov