Maybe we don’t want to know.
The USDA publishes yearly results. The U.S. Department of Agriculture implemented the USDA’s Pesticide Detection Program (PDP) in 1991 to test food commodities for pesticide residues. The test data is used to estimate consumer dietary exposure to pesticides and the relationship of those exposures to science-based standards of safety, ensuring consumer protection from unacceptable pesticide exposure.
The PDP’s results from 2009 (latest year) are online at http://www.ams.usda.gov/AMSv1.0/getfile?dDocName=STELPRDC5091055
The National Pesticide Information Center is an excellent source of science-based information http://npic.orst.edu/index.html.
NPIC has information on food safety as it relates to conventional and organic foods with many links and answers to questions. http://npic.orst.edu/health/food.html.
Yes, ignorance is bliss…..