When it comes to buying organic, here is the 2020 list of "The Dirty Dozen," which typically have high concentrations of pesticide residue and are best to buy organic, and "The Clean 15," which are typically low in pesticide residue.

Produce with High / Low Pesticide Amounts

The Dirty Dozen

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

The Clean 15

1. Avocado
2. Sweet Corn
3. Pineapple
4. Onion
5. Papaya
6. Sweet Peas Frozen
7. Eggplant
8. Asparagus
9. Cauliflower
10. Cantaloupes
11. Broccoli
12. Mushrooms
13. Cabbage
14. Honeydew Melon
15. Kiwi

Source: EWG