Dirty dozen (worst first):
Peaches
Apples
Bell Peppers
Celery
Nectarines
Strawberries
Cherries
Kale
Lettuce
Grapes (Imported)
Carrots
Pears
Clean 15 (best first):
Onion
Avocado
Sweet Corn
Pineapple
Mango
Asparagus
Sweet Peas
Kiwi
Cabbage
Eggplant
Papaya
Watermelon
Broccoli
Sweet Potato