Toxic Release Inventory data for 2024. 20 facilities reported releasing pentachlorobenzene.
| Facility | State | On-site (lb) |
|---|---|---|
| Elemental Environmental Solutions Llc Arkadelphia | Arkansas | 5.2k |
| Chemours Delisle Plant Pass Christian | Mississippi | 285 |
| Chemours Johnsonville Plant New Johnsonville | Tennessee | 176 |
| The Dow Chemical Co - Louisiana Operations Plaquemine | Louisiana | 2 |
| Westlake Us 2 Llc Westlake | Louisiana | 0 |
| Freeport_olin Bc Freeport | Texas | 0 |
| Westlake Vinyls Inc Calvert City | Kentucky | 0 |
| Veolia Es Technical Solutions Llc Port Arthur Facility Beaumont | Texas | 0 |
| Blue Cube Operations Llc - Plaquemine Site Plaquemine | Louisiana | 0 |
| Heritage Thermal Services East Liverpool | Ohio | 0 |
| Clean Harbors Aragonite Llc Grantsville | Utah | 0 |
| Clean Harbors El Dorado Llc El Dorado | Arkansas | 0 |
| Clean Harbors Deer Park Llc La Porte | Texas | 0 |
| Ross Incineration Services Inc Grafton | Ohio | 0 |
| Chemical & Metal Industries Inc Hudson | Colorado | 0 |
| Veolia N.a. Inc. Sauget | Illinois | 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, 20 facilities reported releasing pentachlorobenzene to EPA's TRI program.
Releases are spread across all three environmental pathways: 32 lb to air (stack and fugitive emissions), 2 lb to water (surface water discharges), and 6.2k lb to land (landfills, surface impoundments, and land treatment).
TRI data represents reported releases, not measured environmental concentrations. A facility reporting large releases of pentachlorobenzene 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.