National Assessment Shows Geographic Distribution and Trends of Pesticide Use

For the first time, national maps and trend graphs show the distribution of the agricultural use of 459 pesticides for each year during 1992-2009 for the entire conterminous U.S.  The maps and supporting national database of county-level use estimates for each pesticide were developed by the U.S. Geological Survey (USGS) for use in national and regional water-quality assessments.  The national use analysis is based on methods developed by USGS to estimate annual county-level pesticide use for agricultural crops grown throughout the conterminous United States. Pesticide-use data compiled from proprietary surveys of farm operations were used in conjunction with annual harvested-crop acreage reported by the U.S. Department of Agriculture (USDA) to calculate use rates for each crop and year.  For California, use estimates were obtained directly from annual California Department of Pesticide Regulation Pesticide Use Reports.

 

New interactive national maps and trend graphs are available at:  http://water.usgs.gov/nawqa/pnsp/usage/maps

 

Complete results of the USGS analysis of pesticide use are available in two reports, which support the online maps and graphs.

 

Methods Used to Estimate Agricultural Pesticide Use: http://pubs.er.usgs.gov/publication/sir20135009

 

Estimated Annual Pesticide Use Data for 459 Pesticides: http://pubs.er.usgs.gov/publication/ds752

 

 

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