Nearly 70% of non-organic produce sold in the United States contains pesticide residue, according to the Environmental Working Group (EWG). Every year, the EWG ranks pesticide residue levels of fruits and vegetables based on samples taken by the U.S. Department of Agriculture and the Food and Drug Administration, publishing the results in the Shopper’s Guide to Pesticides in Produce.
Included in the report is a list of the most pesticide-tainted produce, which is known as the Dirty Dozen. For 2021, the following were on this list:

  1. Strawberries
  2. Spinach
  3. Kale, collard and mustard greens