Pesticides in polar organic chemical integrative samplers (POCIS) for 97 Midwest U.S. streams, 2013.
In 2013, the U.S. Geological Survey and the U.S. Environmental Protection Agency characterized water-quality stressors and ecological conditions in 100 wadeable streams across the Midwestern United States.  The goal of the study was to determine the relative effects of multiple ecological stressors – contaminants, …