Westlake Chemicals



Westlake Chemical is a petrochemical company that makes plastic products such as polyvinyl choride (PVC) and building materials. It was founded in 1986 by Ting Tsung Chao in 1986 in Houston, Texas. Westlake first purchased a polyethylene plant in Lake Charles, Louisiana, followed by petrochemical plants in Calvert City, Kentucky, in 1990. Investigative journalists have documented many instances of releases of toxic carcinogens from all of these plants - for example Westlake emitted 48,000 times more ethylene dichloride than all other companies in Calvert City put together and over 28 times more vinyl chloride emissions than all of the others. In 2021, five workers were injured in an explosion at Westlake’s plant in Sulphur, Louisiana, and another six workers were injured in an explosion at a company plant in Westlake, Louisiana in January 2022. In June 2022, Westlake agreed to pay a $1 million civil penalty and invest $110 million in safety upgrades at the two Louisiana plants as well as the Calvert City plant. Westlake was also fined $350,000 in November 2020 for mercury pollution of the Ohio river in West Virginia.


Chemicals, petrochemicals


Top 5 Offense Groups (Groups Defined)Penalty TotalNumber of Records
environment-related offenses$118,016,13856
safety-related offenses$791,62555
government-contracting-related offenses$500,0001
employment-related offenses$475,0001
competition-related offenses$12,0001

(September 30, 2022)

Number of Records
Total Penalties
$119,794,763 (September 30, 2022)
Information in this section is drawn from the Violation Tracker database produced by the Corporate Research Project of Good Jobs First in Washington DC. It is the most comprehensive source of data on business violations of laws and regulations in the United States. For specific examples of misconduct, please click on the links.


Article Archive
Videos & Podcasts
Janice Dickerson Speaking on the Grounds of Westlake Chemical plant
Fire at Westlake chemical plant in wake of Hurricane Laura
Westlake PVC chemical plant explodes in Louisiana
8/27/2020 Westlake, LA Large Chemical Fire
Raw video: Air 11 over Louisiana chemical fire near Westlake/Lake Charles
Louisiana chemical plant explosion leaves 6 hurt
6 workers hurt after explosion at Louisiana chemical plant



Recent & Ongoing Campaigns
A March Through Heat, Felony Threats, and Pollution Brings Louisiana’s Cancer Alley to Governor’s Attention

Julie Dermansky | DeSmog | June 5, 2019

On June 3, at the end of a five-day march through stifling heat in Louisiana’s Cancer Alley, activists fighting against environmental racism reached their goal of bringing attention to their area’s injustices to the state capitol. 

Major Investigations
& Lawsuits
Workers who suffered injuries during chemical plant explosion at Westlake sue for $1M plus

Marian Johns | Southeast Texas Record | October 20, 2021

Westlake Chemical is facing a suit after workers were injured during an explosion at their Lousiana plant.

Lawsuits filed following Sept. 27 explosion at Westlake Chemical

Madison Glaser | KPLC | October 4, 2021

A second lawsuit has been filed on behalf of a worker injured in last week’s plant explosion at Westlake Chemical.

Westlake Unit Will Pay $350K To Settle Mercury Pollution Row

Morgan Conley | Law360 | November 30, 2020

A chemical plant owned by a Westlake Chemical Corp. unit will pay over $350000 and install new technology at its site on the Ohio River.

Environmental Impacts
A detailed look at Westlake Chemical plant in Geismar's string of accidental leaks

David Mitchell | The Advocate | March 10, 2019

A small chlorine gas leak from the Westlake Chemical vinyls plant in Geismar on March 4 was the ninth accidental release since the start of 2018.

PERI Pollution Indexes

Based on United States Environmental Protection Agency data ranking the top 100 worst polluters.

Employment Practices
Worker burned in explosion sues Westlake Chemical

John Guidros | American Press | October 4, 2021

A Houston law firm filed suit Monday against Westlake Chemical following a Sept. 27 explosion at the Sulphur plant that injured six contract employees who were working on a planned maintenance turnaround.

4 of 6 injured in explosion at Louisiana chemical plant released from hospital

KPLC | ABC 7 News | September 28, 2021

Six people were injured in an explosion at Westlake Chemical Monday night, KPLC reports. Four of the six have since been released from the hospital, according to company spokesperson Joe Andrepont.


Corporate Headquarters
2801 Post Oak Blvd, Houston, TX 77056
Most Recent Gross Revenue
$15.101 billion (2022) | source
Most Recent Net Revenue
$2.849 billion (2022) | source
Stock Exchange Tickers

Note: Most recent list is not always the most complete list.

Croctail Subsidiary Tool using the CorpWatch API - This API extracts the subsidiary relationship information from Exhibit 21 of companies' 10-K filings with the US SEC.

    Major Shareholders

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    Political Influence

    Open Secrets - Tracks corporate lobbying of US politicians.


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    OpenSecrets.org Profile of Westlake Chemicals

    Import & Export Data

    ImportYeti - Shipping Tracking Tool - Bill of ladings are public information that are too cost prohibitive, challenging to obtain and difficult to use for the average joe. ImportYeti's goal is to solve that problem.

    Subsidy Tracker
    Subsidy Tracker
    Subsidy Tracker is a project of Good Jobs First in Washington DC. It is the most comprehensive source of data on state and federal subsidies in the United States. For more details, click on the links.
    Click here for details on subsidies received by Westlake Chemical
    Tax Havens
    & Evasion
    55 Corporations Paid $0 in Federal Taxes on 2020 Profits

    Matthew Gardner Steve Wamhoff | ITEP | April 2, 2021

    At least 55 of the largest corporations in America paid no federal corporate income taxes in their most recent fiscal year despite enjoying substantial pretax profits in the United States.

    Major Projects
    Westlake Chemical mulls $450M expansion in Geismar; would create 15 new jobs, 200 construction jobs

    Kristen Mosbrucker | The Advocate | August 12, 2019

    Houston-based Westlake Chemical is considering a $450 million expansion in Geismar. Westlake Chemical has not yet made a final determination to move forward with the expansion, according to the company, but it told investors that there's a growing market opportunity for its products. The expansion would be completed by 2023.


    CorpWatch is still gathering procurement data for Westlake Chemical at this time.

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