Established by the Emergency Planning and Community Right-to-Know Act of 1986, the Toxics Release Inventory (TRI) Program was expanded by the Pollution Prevention Act of 1990. Operating under the aegis of the Environmental Protection Agency, the TRI Program allows United States residents access to information on the types of chemicals held within their communities, and equally importantly, what types of chemical are released in close proximity to their communities annually. Using the TRI Explorer search engine available online at the site, individuals can search by entering a zipcode, or by state or county as well. Additionally, individuals can search by chemical type; industry type; and year of data, which currently extends back to 1988. Also, individuals can access waste transfer and waste quantity reports, which are also searchable by region and waste type. Visitors to the site can also examine an entire list of chemicals covered by the TRI program, as well as find out about state TRI programs.