Blake says the best guarantee for keeping produce safe is to make sure it's thoroughly washed.
The Food and Drug Administration offers several tips for cleaning both fresh and organic produce, including:
Wash fruits and vegetables under running water just before eating or cooking.
Use a brush to scrub produce with hard surfaces, such as melons and cucumbers.
Cut away any damaged or bruised areas on fruits and vegetables before preparing or eating.
"Everyone has a job to do -- from the farmer to the person taking the produce to the store to the people selling the produce. And when you bring your produce home, you have a job to do too," Blake said.
The EWG's "Dirty Dozen":
6. Nectarines - imported
7. Grapes - imported
8. Sweet bell peppers
10. Blueberries - domestic
12. Kale/Collard greens
The EWG's Clean 15:
2. Sweet Corn
6. Sweet peas
9. Cantaloupe - domestic
13. Sweet potatoes