The Survey of Occupational Injuries and Illnesses (SOII) focuses on surveillance of non-fatal workplace injuries and illnesses. The Illinois SOII is supported through a cooperative agreement between the states and the U.S. Department of Labor's Bureau of Labor Statistics (BLS). The Illinois data are pooled with that from other states to provide the total injury and illness rate for each industrial group at the national level. Because of Illinois' participation, the state-specific data also are published annually giving information on incidence rates for the type of injury, body part of the injury, source of the injury and event causing the injury for non-fatal workplace injuries and illnesses.
The Department began participating in the SOII in October 1998. BLS determines the survey sample of Illinois businesses and governmental agencies, supplies the necessary questionnaire booklets and computer systems, and performs data analyses and tabulations. The Department receives the completed booklets from various companies, provides follow-up with companies to collect missing data, codes supplied information, and enters the data into a BLS computer system. Illinois specific data, including counts and rates, have been released since 1998.