Great Lakes Monitoring
Pesticides In Air
Atmospheric Concentrations of Pesticides Through 2002
Goal: Virtually eliminate sources to the Great Lakes and continue declines in air concentrations.
Status: Most monitored pesticides have been banned in the U.S. and Canada, so inputs from within the Great Lakes basin have decreased.
Trends: Concentrations in air and precipitation have been declining since monitoring began in the early 1990s.
Issues: Banned pesticides may still be released into the air from soils where they were once applied and areas where existing stockpiles are stored. They may also be present in bottom sediments of rivers and lakes, from which they can eventually volatilize into the air. Air currents can carry these pesticides from other countries where they are still used. EPA is working internationally to reduce use of these substances and find alternatives.