1. U.S. Department of Agriculture-Agricultural Research Service, Environmentally Integrated Dairy Management Research Unit, 2615 Yellowstone Drive, Marshfield, Wisconsin 54449, United States
2. U.S. Geological Survey and U.S. Department of Agriculture-Agricultural Research Service, Laboratory for Infectious Disease and the Environment, 2615 Yellowstone Drive, Marshfield, Wisconsin 54449, United States
3. U.S. Geological Survey, Upper Midwest Water Science Center, 2615 Yellowstone Drive, Marshfield, Wisconsin 54449, United States
4. Polk County Conservation, 11204 NE 118th Avenue, Maxwell, Iowa 50161, United States
5. Drake University, Department of Environmental Science and Sustainability, 116 Olin Hall, 2507 University Avenue, Des Moines, Iowa 50311, United States