EWG’s analysis showed fungicides to be four of the five most frequently detected chemicals in fruit and vegetables: fludioxonil, pyraclostrobin, boscalid, and pyrimethanil. Moreover, fludioxonil and pyrimethanil show up in the highest average concentrations of any pesticides found on the Dirty Dozen. Both fungicides may be endocrine disruptors with the potential to harm the male reproductive system.

Overall, EWG found that 75 percent of all conventional fresh produce sampled had residues of potentially harmful pesticides. But for items on the Dirty Dozen, 95 percent of samples contained pesticides. Of the 46 foods included in EWG’s analysis, the following were the most contaminated, and are known as the Dirty Dozen:

1. Strawberries
2. Spinach
3. Kale, collard, and mustard greens
4. Grapes
5. Peaches
6. Pears
7. Nectarines
8. Apples
9. Bell and hot peppers
10. Cherries
11. Blueberries
12. Green beans.

On the other hand, almost 65 percent of EWG’s 2024 Clean Fifteen fruit and vegetable samples had no detectable pesticide residues. The Clean Fifteen is made up of:

1. Avocados
2. Sweet corn
3. Pineapple
4. Onions
5. Papaya
6. Asparagus
7. Honeydew melon
8. Kiwi
9. Cabbage
10. Watermelon
11. Mushrooms
12. Mangoes
13. Sweet potatoes
14. Carrots.

EWG recommends consumers seeking fresh produce with low pesticide residues buy organic versions of items on EWG’s Dirty Dozen, and either organic or conventional versions of produce on the Clean Fifteen.

Some industry stakeholder groups raise issue with EWG’s Dirty Dozen list, calling it scientifically unsupported and raising issue with its consumer impact. The Alliance for Food and Farming cite studies suggesting that the levels of pesticides present in conventionally grown produce are so low that substitution with organic produce does not decrease risk. The group underlines that the health benefits of consuming more produce outweigh the risks of pesticide exposure, and that washing produce can be effective in reducing or eliminating pesticide residues that are present.