Here is EWG’s list of the most contaminated produce — The Dirty Dozen (and most important to buy organic):
- Strawberries
- Spinach
- Kale, Collard, & Mustard Greens
- Nectarines
- Apples
- Grapes
- Bell & Hot Peppers
- Cherries
- Peaches
- Pears
- Celery
- Tomatoes
And here is their list of the least contaminated produce — The Clean Fifteen:
- Avocados
- Sweet Corn*
- Pineapples
- Onions
- Papayas*
- Sweet Peas, frozen
- Asparagus
- Honeydew Melon
- Kiwi
- Cabbage
- Mushrooms
- Cantaloupe
- Mangoes
- Watermelons
- Sweet Potatoes
* A small amount of sweet corn and papaya sold in the United States is produced from bioengineered seeds. Buy organic varieties of these crops if you want to avoid genetically modified produce.
https://foodrevolution.org/blog/how-to-wash-vegetables-fruits/