Michigan State University


NAPRA is the National Agricultural Pesticide Risk Analysis (NAPRA) tool developed by the Natural Resources Conservation Service, USDA. It provides an automated pesticide risk screening process by using an environmental fate model GLEAMS (Groundwater Loading Effects of Agricultural Management System). NAPRA can provide climate-based probabilities of off-site pesticide loadings and concentrations. It assesses the risk of pesticide loss from the bottom-of-the-rootzone and the edge-of-the-field, which could potentially contaminate surface and groundwater. The risk is rated according to the EPA drinking water standard. Implementing NAPRA requires interdisciplinary technical support and a variety of data inputs. Several counties are chosen as pilot study areas in implementing NAPRA process in Michigan.  NAPRA approach may help farmers identify best management practices to reduce hazardous off-site pesticide losses. Farmers and other potential users can get access to our NAPRA Web site via Internet. We hope this web site may provide a convenient and efficient way to help extension personnal and farmers use NAPRA technology to assess the potential risk of pesticides in the farmlands. 

Five Michigan counties are chosen to represent different soils, climate, and agricultural characteristics.  These five counties are loacated in five most important agricultural districts in Michigan.  NAPRA scenarios are available for those Agricultural Districts with a selected county as the study area.   Please choose an area of your interest from the map or text below. 

Michigan Map

If you have any suggestions and comments about NAPRA implementation in Michigan, please contact the Institute of Water Research, Michigan State University at ouyangda@msu.edu.

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