Multi-Region Assessment of Pharmaceutical Mixtures and Predicted Effects in Urban-Gradient, Headwater Streams Across the United States

Paul M Bradley1, Celeste A Journey1, Kristin M Romanok2 and Peter C Van Metre3, (1)USGS South Atlantic Water Science Center, Columbia, SC, United States, (2)USGS New Jersey Water Science Center, West Trenton, United States, (3)USGS Texas Water Science Center, Austin, TX, United States