The FIFRA Scientific Advisory Panel is being asked to review and consider the Agency's analysis of evidence that exposure to atrazine may be associated with an increased incidence of prostate cancer in humans. The Agency's analysis considers the currently available epidemiology data and largely focuses on a study at a manufacturing plant in Louisiana. This study, initially funded by Ciba-Geigy, later by Novartis, and now by Syngenta, has been updated a number of times over the years as more data on the mortality and incidence of disease have become available. The study was conducted by Dr. Elizabeth Delzell and her colleagues at the University of Alabama. In addition, the Agency's analysis considers a recently published study on prostate cancer results from the Agricultural Health Study (Alavanja et al. 2003) and a correlation analysis of pesticide use and cancer incidence in California counties (Mills 1998).