Here are the most contaminated — and cleanest — fruits and veggies.

The Environmental Working Group (EWG) recently released its 2017 “Dirty Dozen” and “Clean Fifteen” lists — a catalog of fruits and vegetables with the highest and lowest amounts of pesticide residue. Strawberries still top the “Dirty Dozen” list — in fact, one sample of strawberries had more than 20 different pesticides.

The increased insect burden has driven up pesticide use. While toxicity levels and concentrations vary by item, synthetic pesticides should be avoided (or severely limited) for infants, babies, and young children, the EWG reports.

Bottom line? “Eating plenty of fruits and vegetables is essential no matter how they’re grown, but for the items with the heaviest pesticide loads, we urge shoppers to buy organic,” said EWG senior analyst Sonya Lunder in a statement. “If you can’t buy organic, the Shopper’s Guide will steer you to conventionally grown produce that is the lowest in pesticides.”

Here’s a list of the “Dirty Dozen” and the “Clean Fifteen”:

The Dirty Dozen:

  1. Strawberries
  2. Spinach
  3. Nectarines
  4. Apples
  5. Peaches
  6. Pears
  7. Cherries
  8. Grapes
  9. Celery
  10. Tomatoes
  11. Sweet bell peppers
  12. Potatoes

The Clean Fifteen:

  1. Sweet corn
  2. Avocados
  3. Pineapples
  4. Cabbage
  5. Onions
  6. Sweet peas, frozen
  7. Papaya
  8. Asparagus
  9. Mangos
  10. Eggplant
  11. Honeydew melon
  12. Kiwi
  13. Cantaloupe
  14. Cauliflower
  15. Grapefruit

For a full list of where various fruits and veggies rank, visit the EWG website.