Herein are described 1058 different bacterial taxa that were unique to either human, grazing mammal, or bird fecal wastes. These identified taxa can serve as specific identifier taxa for these sources in environmental waters. Two field tests in marine waters demonstrate the capacity of phylogenetic microarray analysis to track multiple sources with one test.
STATEMENT OF GOVERNMENTAL SUPPORT
 This invention was made with government support under Contract No. DE-AC02-05CH11231 awarded by the U.S. Department of Energy, and under Grant No. ES013515 awarded by the National Institute of Health. Further funding and support provided by the California State Water Resources Control Board Clean Beaches Initiative (07-576-550-0), and the County of Marin under Work for Others Agreement LB08004214, the US Environmental Protection Agency and the City of Dana Point. The government has certain rights in the invention.