Pilot Project: Methods for Accessing Pesticide/Nitrate Environmental Exposure Databases

(PNASH Pilot, 1998-1999) Agricultural use of pesticides and fertilizers has grown dramatically in the last several years. Contamination of the hydrologic system by these chemicals is an increasing concern and much effort has been made to build databases containing measurements of these chemicals in drinking water sources. These geographically-referenced data (accessible by latitude/longitude coordinates of the target residence or facility) have yet to be used in epidemiologic studies of health outcomes. This project investigated the use of Global Positioning System (GPS)-obtained coordinates for linkage of environmental exposure data (pesticide/nitrate levels in drinking water).