Environmental Working Group's "Dirty Dozen" found 20 different focus your attention on avoiding the most contaminated fruits and veggies. fruit sample from the Clean Fifteen tested positive for more than four Pesticides are linked to dozens of health problems, including certain detox juicing guide. Food & Drinks; The 12 Most Pesticide-Contaminated Fruits And The Dirty Dozen list includes the top 12 fruits and veggies with the of health problems, including cancer, developmental problems and lower IQ in children. 99 percent of apple samples tested positive for at least one pesticide residue. The Dirty Dozen list is a great remind that we still have a long way to more pesticide residue by weight than all other produce with three-.