Toxic Release Inventory data for 2024. 13 facilities reported releasing hexachloro-1, 3-butadiene.
| Facility | State | On-site (lb) |
|---|---|---|
| Occidental Chemical Holding Corp - Geismar Plant Geismar | Louisiana | 2.0k |
| Westlake Us 2 Llc Westlake | Louisiana | 73 |
| Blue Cube Operations Llc - Plaquemine Site Plaquemine | Louisiana | 48 |
| Westlake Vinyls Inc Calvert City | Kentucky | 18 |
| Veolia Es Technical Solutions Llc Port Arthur Facility Beaumont | Texas | 6 |
| Clean Harbors Environmental Services Inc Kimball | Nebraska | 2 |
| Occidental Chemical Corp Gregory | Texas | 0 |
| Heritage Thermal Services East Liverpool | Ohio | 0 |
| Freeport_olin Bc Freeport | Texas | 0 |
| Clean Harbors Deer Park Llc La Porte | Texas | 0 |
| Clean Harbors Aragonite Llc Grantsville | Utah | 0 |
| Heidelberg Materials Us Cement Llc Logansport | Indiana | 0 |
| Westlake Chemicals & Vinyls Llc Plaquemine | Louisiana | 0 |
The Toxic Release Inventory (TRI) tracks how much of each listed chemical U.S. industrial facilities release into the environment each year. EPA requires facilities in certain industry sectors that manufacture, process, or otherwise use TRI-listed chemicals above threshold amounts to report annually. In 2024, 13 facilities reported releasing hexachloro-1, 3-butadiene to EPA's TRI program.
Releases are spread across all three environmental pathways: 2.1k lb to air (stack and fugitive emissions), 25 lb to water (surface water discharges), and 3 lb to land (landfills, surface impoundments, and land treatment).
TRI data represents reported releases, not measured environmental concentrations. A facility reporting large releases of hexachloro-1, 3-butadiene is not necessarily causing harm at those levels — toxicity, exposure pathways, and local conditions all matter. Conversely, small reported amounts of highly toxic chemicals can pose greater risk than large amounts of less toxic ones. TRI is a transparency tool, not a risk assessment.
For health information about specific chemicals, the Agency for Toxic Substances and Disease Registry (ATSDR) publishes toxicological profiles, and EPA's Integrated Risk Information System (IRIS) provides reference doses and cancer classifications.