The dirty dozen are peaches, apples, sweet bell peppers, celery, nectarines, strawberries, cherries, lettuce, grapes (imported), pears, spinach, and potatoes. The cleanest are onions, avocados, sweet corn (frozen), pineapples, mangos, sweet peas (frozen), asparagus, kiwis, bananas, cabbage, broccoli, and eggplants.
Think about organic when you are choosing 1 of the dirty dozen.