Under the Federal Emergency Planning and Community Right-to-Know Act of 1986 (EPCRA), affected companies must report 'on- and off-site disposal or other releases' to the environment of more than 650 toxic chemicals. The 17th Annual Toxic Chemical Report documents reported releases of toxic chemicals in Illinois for calendar year 2003, the most recent data available. In 2003, 1,239 facilities in Illinois reported toxic chemical releases of 132,401,173 pounds, which is the 9th largest amount among states. The most common type of release was air emissions, accounting for approximately 42 percent of reported releases. The top five Illinois countries for reported toxic releases were: (1) Peoria; (2) Cook; (3) Madison; (4) Montgomery; (5) Macon.