Toxic Release Inventory (TRI) sites indicate locations of potential contaminants identified on the federal TRI, which is a database made available to the public by the US Environmental Protection Agency. The TRI tracks the management of over 650 toxic chemicals that may pose a threat to human health and the environment. Facilities in different industry sectors must report annually how much of each chemical they release to the environment and/or manage through recycling, energy recovery, and treatment. Facilities that report to the TRI are typically larger facilities involved in manufacturing, mining, electric power generation, chemical manufacturing, and hazardous waste treatment.