Westlake Vinyls Inc – Emissions Trend
Calvert City, KY · 2019–2023 · Parent: Westlake Corp
This page assembles 5 consecutive years of EPA Toxics Release Inventory Form R filings for Westlake Vinyls Inc, spanning 2019–2023. Each annual total aggregates on-site air emissions, surface-water discharges, land disposal, and off-site transfers reported by the facility under EPCRA Section 313, which requires disclosure whenever a listed chemical is manufactured, processed, or otherwise used above threshold quantities.
Reported releases opened at 470.0K in 2019 and closed at 348.0K in 2023 – a decrease of 26.0% over the window. The chart below stacks the four TRI release media (air, water, land, off-site) and overlays the yearly total. The top contributor by cumulative mass is Ethylene at 614.0K, followed by Propylene at 303.4K.
Because TRI figures are estimated, not metered, year-over-year deltas can reflect methodology revisions, ownership changes, or shifts in what a facility classifies as reportable, not only physical emission changes. Treat the trajectory as a disclosure record, and cross-reference with the EPA Enforcement and Compliance History Online (ECHO) system for the fuller regulatory picture on this chemicals facility.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Westlake Vinyls Inc's total reported releases rose from 332.0 thousand lb in 2022 to 348.0 thousand lb in 2023, based on EPA TRI filings.
- Westlake Vinyls Inc's water releases rose from 1.5 thousand lb in 2022 to 1.6 thousand lb in 2023, based on EPA TRI filings.
- Westlake Vinyls Inc's air releases rose from 318.0 thousand lb in 2022 to 333.6 thousand lb in 2023, based on EPA TRI filings.
- Westlake Vinyls Inc's off-site transfers rose from 12.5 thousand lb in 2022 to 12.8 thousand lb in 2023, based on EPA TRI filings.
Total Releases by Category
Year-over-Year Comparison
| Year | Total | Chemicals | YoY Change |
|---|---|---|---|
| 2019 | 470.0K lbs | 46 | - |
| 2020 | 519.1K lbs | 48 | +10.4% |
| 2021 | 500.6K lbs | 48 | -3.6% |
| 2022 | 332.0K lbs | 49 | -33.7% |
| 2023 | 348.0K lbs | 49 | +4.8% |
Top Chemicals by Year
| Chemical | 2019 | 2020 | 2021 | 2022 | 2023 | Total |
|---|---|---|---|---|---|---|
| Ethylene | 136.0K | 138.6K | 130.1K | 97.5K | 111.9K | 614.0K |
| Propylene | 75.7K | 84.1K | 83.6K | 28.5K | 31.5K | 303.4K |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 57.8K | 57.5K | 46.5K | 47.0K | 46.4K | 255.2K |
| 1,2-Dichloroethane | 48.7K | 54.7K | 57.4K | 42.2K | 48.5K | 251.5K |
| Vinyl chloride | 48.9K | 58.2K | 59.3K | 22.4K | 23.2K | 212.1K |
| Benzene | 23.3K | 32.7K | 38.0K | 25.1K | 23.9K | 143.1K |
| 1,3-Butadiene | 12.6K | 12.2K | 10.1K | 12.4K | 7.9K | 55.2K |
| Copper | 10.7K | 14.6K | 9.4K | 6.8K | 7.3K | 48.8K |
| Dicyclopentadiene | 9.1K | 9.5K | 9.1K | 10.2K | 9.4K | 47.2K |
| Naphthalene | 9.3K | 8.6K | 7.7K | 7.8K | 7.7K | 41.0K |
| Styrene | 6.2K | 5.9K | 5.2K | 6.0K | 6.1K | 29.4K |
| Carbon tetrachloride | 8.8K | 9.7K | 9.4K | 396 | 97 | 28.4K |
| Allyl alcohol | 4.8K | 5.1K | 4.6K | 6.5K | 5.7K | 26.7K |
| Toluene | 5.3K | 6.4K | 6.3K | 2.5K | 2.5K | 23.1K |
| Chlorine | 3.8K | 4.4K | 4.5K | 3.9K | 3.8K | 20.4K |
About This Data
Trend data is sourced from the EPA Toxic Release Inventory (TRI). Facilities report annually. Release quantities are self-reported estimates. Year-over-year changes may reflect changes in production, pollution control measures, reporting methodology, or chemical thresholds.
A decrease in reported releases does not necessarily indicate improved environmental performance, as it may reflect production cutbacks, facility closures, or changes in reporting requirements. Similarly, increases may reflect expanded production rather than degraded environmental practices.
Frequently Asked Questions
Is Westlake Vinyls Inc getting cleaner or dirtier? ▼
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Read our methodology - how this data is sourced, computed, and verified.