EPA TRI Facility · Chemicals
Westlake Compounds LLC
Madison, MS · Parent: Westlake Corp
- Total releases
- 3.3K lbs
- Chemicals reported
- 5
- Carcinogens
- 1
- Primary pathway
- Air Releases
MIXED Form-R mix
Westlake Compounds LLC: how the 3.3K lbs splits
3.3K lbs across all reported pathways
- Air Releases 2.0K lbs 61.8%
- Off-site Transfers 1.0K lbs 30.3%
- Water Discharges 260 lbs 7.9%
Westlake Compounds LLC's 3.3K lbs Form-R total is MIXED - air releases is 61.8% of the bar. Next segment: off-site transfers at 30.3%. Leading chemical by pounds: Antimony And Antimony Compounds.
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.
LIGHT volume MIXED pathway TRACE-CARC
Westlake Compounds LLC is an EPA Toxics Release Inventory reporter in Madison, MS, in the chemicals sector. It reported 243 lbs of releases across 4 chemicals in 2023, and 3.3K lbs in total across its 2019-2023 reporting years. That ranks 11,949 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 Compounds LLC is pounds #178 and chemical-count #77 at 3.3K 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: Kasai N.a. Inc Madison Plant; Tower Automotive; Mmc Materials Inc - Gluckstadt; Mmc Materials Inc - Ragsdale Road. Similar-scale Chemicals peers outside Mississippi: Flint Group Packaging Inks N.a. Corp; Icu Medical Inc; Environmental Inks - a Member of the Siegwerk Group; Bullen Cos. 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: Antimony And Antimony Compounds; Zinc compounds; Antimony compounds; Lead.
Westlake Compounds LLC is a LIGHT · MIXED-pathway Form-R site in Madison, MS: 3.3K lbs across 5 chemicals (1 carcinogen-classified, TRACE-CARC). No single media clears 70% of the bar (lead segment air releases at 61.8%). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Flint Group Packaging Inks N.a. Corp and Icu Medical Inc.
Westlake Compounds LLC vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
3.3K lbs Top 46% higher than 54% 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 Compounds LLC: Antimony And Antimony Compounds-led volume
Among the 3,917 Chemicals facilities in this database, Westlake Compounds LLC reports the 2,473rd-largest volume (3.3K lbs). Its reported volume is concentrated rather than spread: Antimony And Antimony Compounds alone is 84.5% of the total. Scale peers outside Mississippi include Flint Group Packaging Inks N.a. Corp and Icu Medical Inc.
Concentrated means ≥60% of Westlake Compounds LLC's pounds in one chemical - here Antimony And Antimony Compounds at 84.5%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Westlake Compounds LLC's total reported releases fell from 431 lb in 2022 to 243 lb in 2023, based on EPA TRI filings.
- Westlake Compounds LLC's air releases fell from 431 lb in 2022 to 243 lb in 2023, based on EPA TRI filings.
- Westlake Compounds LLC's chemicals reported rose from 3 in 2022 to 4 in 2023, based on EPA TRI filings.
Westlake Compounds LLC Form-R facts
Compare this facility
See how Westlake Compounds LLC stacks up against nearby facilities and the typical reporter.
86% less than the comparison
5.0× 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 Compounds LLC releases toxic chemicals into the environment. Total: 3.3K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases increased by 4760% (5 lbs to 243 lbs).
Westlake Compounds LLC: annual Form-R pounds
LIGHT site · MIXED pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Westlake Compounds LLC year-over-year reported totals (increased by 4760% 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: Antimony And Antimony Compounds.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 5 lbs | 3 |
| 2020 | 2.3K lbs | 2 |
| 2021 | 363 lbs | 3 |
| 2022 | 431 lbs | 3 |
| 2023 | 243 lbs | 4 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 1 of 5 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Antimony And Antimony Compounds | 2.8K lbs | - |
| Zinc compounds | 505 lbs | - |
| Antimony compounds | 5 lbs | - |
| Lead | 1 lbs | Carcinogen |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0 lbs | - |
Westlake Compounds LLC in Madison
Nearest TRI Facilities to Westlake Compounds LLC
Closest other reporters in Mississippi - including Kasai N.a. Inc Madison Plant, Tower Automotive, Mmc Materials Inc - Gluckstadt, 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. Flint Group Packaging Inks N.a. Corp, Icu Medical Inc, Environmental Inks - a Member of the Siegwerk Group.
Compare beyond Mississippi
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Westlake Compounds LLC on cumulative reported pounds (3.3K lbs) and distinct chemical count (5). Release-pound peers include Soprema Inc, Rheem Manufacturing Water Heater Div, Flint Group Packaging Inks N.a. Corp. Chemical-count peers include Abbvie Ltd, Lilly del Caribe Inc Carolin A, Baxter Healthcare of Puerto Rico LLC. 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 Antimony And Antimony Compounds, Zinc compounds, Antimony compounds, Lead; nearby reporters include Kasai N.a. Inc Madison Plant. Westlake Compounds LLC stamps LIGHT volume · MIXED pathway · TRACE-CARC 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 Compounds LLC TRI extract (LIGHT · MIXED · TRACE-CARC · lead Antimony And Antimony Compounds) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Westlake Compounds LLC totals are self-reported EPCRA §313 estimates for Madison, MS, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 325991 · Chemicals. 0.2% of Madison TRI pounds in this extract. Nearest ABS peer: Soprema Inc (Δ 0 lbs). Pounds ≠ exposure.
Westlake Compounds LLC stamps LIGHT · MIXED pathway (air releases leads at 61.8%). Pipeline-rendered EPA Form-R only - no editor-typed pounds. 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