Written by: Wallace Merriman

What Is The Top Dirtiest Fruit or Vegetable?
Posted on:Aug 30, 2017

Every year, the Environmental Working Group (EWG) conducts an analysis of tests by the U.S. Department of Agriculture found that nearly 70 percent of samples of 48 types of conventional produce were contaminated with residues of one or more pesticides. USDA researchers found a total of 178 different pesticides and pesticide breakdown products on the thousands of produce samples they analyzed. The pesticide residues remained on fruits and vegetables even after they were washed and, in some cases, peeled.

For the Dirty Dozen list, EWG singled out produce with the highest loads of pesticide residues. In addition to strawberries and spinach, this year’s list includes nectarines, apples, peaches, celery, grapes, pears, cherries, tomatoes, sweet bell peppers, and potatoes.

Each of these foods tested positive for a number of different pesticide residues and contained higher concentrations of pesticides than other produce. Pears and potatoes were new additions to the Dirty Dozen, displacing cherry tomatoes and cucumbers from last year’s list.

Key findings:

Nearly all samples of strawberries, spinach, peaches, nectarines, cherries, and apples tested positive for residue of at least one pesticide.

  • The most contaminated sample of strawberries had 20 different pesticides.
  • Spinach samples had an average of twice as much pesticide residue by weight than any other crop. Three-fourths of spinach samples had residues of a neurotoxic pesticide banned in Europe for use on food crops – it’s part of a class of pesticides that recent studies link to behavioral disorders in young children.

By contrast, EWG’s Clean Fifteen™ list of produce least likely to contain pesticide residues includes sweet corn, avocados, pineapples, cabbage, onions, frozen sweet peas, papayas, asparagus, mangoes, eggplant, honeydew melon, kiwis, cantaloupe, cauliflower, and grapefruit. Relatively few pesticides were detected on these foods and tests found low total concentrations of pesticide residues on them.

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