aerial photo of farm “The Heinz Center depends heavily on NAWQA data to support our periodic report: “The State of the Nation’s Ecosystems.” NAWQA data provide the foundation of our description of chemical contamination—including pesticides and other compounds—both nationally and among different land uses, and for tracking how contaminant levels change over time. We appreciate NAWQA’ strong commitment to making its information and data readily accessible to meet our organization’s needs and to address the Nation’s water-resource information needs.” (Robin O’Malley, Senior Fellow and Program Director, The H. John Heinz III Center for Science, Economics and the Environment)

USGS Circular 1291, The Quality of Our Nation's Waters Pesticides in the Nation's Streams and Ground Water, 1992-2001