The Clean Air Society of Australia and New Zealand (CASANZ) is a non-governmental, non-profit organization formed in the 1960's to bring together people with an interest in clean air and the study of air pollution. Its focus has since grown to include broader environmental management affairs, but with special emphasis on air quality and related issues. As of October 2005, the society had 836 members (683 in Australia, 140 in New Zealand, and 13 in other countries).