University of Iowa Study Reveals Widespread Pesticide Contamination in Iowa's Environment
A recent study by the University of Iowa has found widespread pesticide contamination in Iowa's environment, with pesticides detected in surface water, urban canopies, and indoor dust. Researchers analyzed 193 surface water samples from northeastern Iowa between 2024 and 2026, finding two insecticides, clothianidin and imidacloprid, in 98% and 82% of samples, respectively. Concentrations of these insecticides often exceeded EPA thresholds for aquatic life. Atrazine, an herbicide reclassified as 'probably carcinogenic to humans' by the International Agency for Research on Cancer, was found in 91% of samples analyzed in 2025 and 2026. Leaf samples from public parks and elementary schools in Iowa City also showed pesticides, with patterns matching typical agricultural application timelines. A pilot study in 28 rural and urban households revealed pesticides in indoor dust, including fungicide azoxystrobin in 80% of samples and imidacloprid in 79%. This research, part of the Iowa Integrated Network for Science,...