Influence of Watershed Scale Atrazine Reduction Practices on Pesticides and Fishes within Channelized Agricultural Head- water Streams
نویسندگان
چکیده
Agricultural pesticides (i.e., insecticides, herbicides, and fungicides) represent a threat to drinking water quality and aquatic life within agricultural streams. Many agricultural streams serve as source waters for urban drinking water supplies within the Midwestern United States. Transport of pesticides from upstream agricultural streams to downstream drinking water supplies can result in an increase in pesticide concentrations in raw and finished tap water that exceed the established drinking water standards to protect human health (Brian, 1995; Coupe and Blomquist, 2004). Pesticide risks to aquatic life in agricultural streams are greater than risks to human health because agricultural streams routinely exceed benchmark levels established to protect aquatic life (Gilliom, 2007). Excessive pes-
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