The purpose of the report is to disseminate information provided to the NATICH data base by state and local air agencies on their air toxics activities. This computer generated report supersedes manually prepared interim reports published in September 1984 and March 1985. It both updates and extends the information in the first two reports and contains information received up until July 1985. The report includes a listing of state and local agencies that have provided information to the Clearinghouse, air toxics contacts, regulatory program information, acceptable ambient concentrations and standards, pollutant research information, methods development activities, permitting information, source testing information, and ambient monitoring information.