The Environmental Working Group has published its annual pesticide warning list. The group's annual Dirty Dozen and Clean Fifteen lists are based off USDA data. The EWG doesn't suggest you should stop eating any fruits or veggies out of pesticide-related fears. Just make sure you wash your produce thoroughly before consumption. Fruits with the most pesticide levels include strawberries, peaches, cherries, and pears. Vegetables to look out for include spinach, celery, and potatoes.