Opt for organic foods to avoid pesticides. Here’s a list of the top 10 most contaminated fruits and veggies (peaches are the worst), compiled by the Environmental Working Group: 1. Peaches 2. Apples 3. Sweet Bell Peppers 4. Celery 5. Nectarines 6. Strawberries 7. Cherries 8. Kale 9. Lettuce 10. Grapes (Imported) Source: http://www.ewg.org/foodnews/list/