Toxic Release Inventory data for 2024. 20 facilities reported releasing 4, 4'-methylenedianiline.
| Facility | State | On-site (lb) |
|---|---|---|
| Rubicon Llc Geismar | Louisiana | 148.6k |
| Future Pipe Industries Houston | Texas | 3.8k |
| Basf Corp Geismar | Louisiana | 1.9k |
| Evonik Corp Haysville | Kansas | 1.0k |
| Huntsman Advanced Materials Llc Mc Intosh | Alabama | 285 |
| Clean Harbors Environmental Services Inc Kimball | Nebraska | 80 |
| Heraeus Epurio Llc Vandalia | Ohio | 19 |
| Veolia Es Technical Solutions Llc Port Arthur Facility Beaumont | Texas | 5 |
| Duoline Technologies Inc. Gilmer | Texas | 2 |
| Solvay Specialty Polymers Usa Llc Greenville | South Carolina | 1 |
| Clean Harbors Deer Park Llc La Porte | Texas | 0 |
| Clean Harbors El Dorado Llc El Dorado | Arkansas | 0 |
| Clean Harbors Aragonite Llc Grantsville | Utah | 0 |
| Elantas Pdg Inc Saint Louis | Missouri | 0 |
| Nov Fiber Glass Systems-Burkburnett Burkburnett | Texas | 0 |
| Covestro Llc Baytown | Texas | 0 |
| Urethane Systems Usa Llc Gastonia | North Carolina | 0 |
| Evonik Corp Los Angeles | California | 0 |
| Fiber Glass Systems Little Rock | Arkansas | 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 4, 4'-methylenedianiline to EPA's TRI program.
Releases are spread across all three environmental pathways: 5.6k lb to air (stack and fugitive emissions), 2.9k lb to water (surface water discharges), and 149.6k lb to land (landfills, surface impoundments, and land treatment).
TRI data represents reported releases, not measured environmental concentrations. A facility reporting large releases of 4, 4'-methylenedianiline 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.