The government conducted tests to determine which vegetables contain highest levels of pesticides.
Apples, peaches, nectarines, strawberries, grapes, celery, spinach, sweet bell peppers, cucumbers, cherry tomatoes, imported snap peas and potatoes.
Each of these foods tested positive a number of different pesticide residues and showed higher concentrations of pesticides than other produce items.
99 percent of apple samples, 98 percent of peaches, and 97 percent of nectarines tested positive for at least one pesticide residue.
The average potato had more pesticides by weight than any other produce.
A single grape sample and a sweet bell pepper sample contained 15 pesticides.
Single samples of cherry tomatoes, nectarines, peaches, imported snap peas and strawberries showed 13 different pesticides apiece.