Kansas is important to about 300,000 people in the Wichita area that rely on the reservoir as a source of drinking water. About 52 percent of the watershed is used for the production of grain crops, which generally rely on the use of pesticides for efficient production. Some pesticides subsequently may be transported in runoff water to Cheney Reservoir. The potential exposure to pesticides is of concern. The purpose of this fact sheet is to describe the occurrence of pesticides in streams within the Cheney Reservoir watershed. Pesticide concentrations are compared with Federal water-quality criteria for pesticides such that public and private organizations can evaluate the potential risks from pesticide exposure.
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