The International Ozone Association will hold the 19th Ozone World Congress featuring a three (3) day technical program and one (1) day of technical tours in Tokyo, Japan from 31 Aug to 03 Sep 2009. The World Congress will bring scientist, engineers and users from around the world to discuss current practice and advancements in ozone technology and applications. Featured applications include municipal drinking water and wastewater treatment and water reuse, industrial process and wastewater, air/gas treatment and food safety.