This report presents the results of an epidemiological study conducted by EPA and its partners into the effects of air pollution on daily mortality in Melbourne. The statistical analysis, conducted by the researchers at the School of Public Health, Griffith University, utilises state of the art statistical methods to identify the impacts of ambient air pollution on daily mortality. The results of the study show that current levels of air pollution in Melbourne are associated with increases in daily mortality and are consistent with studies conducted elsewhere in Australia and overseas.