Whether you are on a budget and need to prioritize your organic purchases, or you would simply like to know which type of produce has the highest pesticide residues—and which do not—the following guide from the Environmental Working Group will help.

12 Most Contaminated
Peaches
Apples
Sweet Bell Peppers
Celery
Nectarines
Strawberries
Cherries
Pears
Grapes (Imported)
Spinach
Lettuce
Potatoes

12 Least Contaminated
Onions
Avocado
Sweet Corn (Frozen)
Pineapples
Mango
Asparagus
Sweet Peas (Frozen)
Kiwi Fruit
Bananas
Cabbage
Broccoli
Papaya