Decision support systems used for urban air quality management provide to improve planning and operational decision making processes by providing useful and scientifically sound information to the public officials, planners and scientists, and possibly the general public. The Environmental Engineering Department of Dokuz Eylul University, in cooperation with the Municipality of Izmir, has newly started an Eureka project (EU1388). In this project, such an expert Decision Supper? System, with the name of Airware, will be used. This study summarizes the architecture and decision support approach of this system.