Toxic Release Inventory data for 2024. 19 facilities reported releasing thiourea.
| Facility | State | On-site (lb) |
|---|---|---|
| Elemental Environmental Solutions Llc Arkadelphia | Arkansas | 254.8k |
| Chemical Waste Management Emelle | Alabama | 11.0k |
| Kennecott Utah Copper Smelter & Refinery Magna | Utah | 1.9k |
| Boston Scientific Weaver Lake Campus Maple Grove | Minnesota | 255 |
| Oilfield Solutions Inc Midland | Texas | 164 |
| Veolia Es Technical Solutions Llc Port Arthur Facility Beaumont | Texas | 5 |
| Heritage Thermal Services East Liverpool | Ohio | 0 |
| Columbus Chemical Industries Inc. Employee Stock Ownership P Columbus | Wisconsin | 0 |
| Connoisseurs Products Corp Woburn | Massachusetts | 0 |
| Syntech Cedar Port Baytown | Texas | 0 |
| Sterling Specialty Chemicals Llc Sand Springs | Oklahoma | 0 |
| Thatcher Co Salt Lake City | Utah | 0 |
| Hexion Inc - Morganton Facility Morganton | North Carolina | 0 |
| Evoqua Water Technologies Llc Roseville | Minnesota | 0 |
| Rsa Corp Danbury | Connecticut | 0 |
| Waxahachie - Powder (Dr) Waxahachie | Texas | 0 |
| Pogo Mine Delta Junction | Alaska | 0 |
| Hydrite Chemical Co. Milwaukee | Wisconsin | 0 |
| Phelps Dodge Copper Products Co El Paso | Texas | 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, 19 facilities reported releasing thiourea to EPA's TRI program.
The primary release pathway is land disposal (267.7k lb), which includes landfills, surface impoundments, land treatment, and underground injection.
TRI data represents reported releases, not measured environmental concentrations. A facility reporting large releases of thiourea 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.