The Environmental Working Group's annual Dirty Dozen guide helps shoppers determine which fruits and vegetables have the most pesticide residues, and are therefore the most important to buy organic. This year's guide is identical to last year's, with two notable additions to the high pesticide watch: leafy greens and green beans. They're calling it Dirty Dozen Plus
to especially highlight green beans and leafy greens like kale and collard greens. While these veggies don't meet traditional Dirty Dozen criteria, the EWG says they are often contaminated with highly toxic organophosphate insecticides, and so should be purchased organic whenever possible.
As usual, the guide also contains a list of the Clean 15, the produce lowest in pesticides and therefore safe to buy conventional.
The Dirty Dozen (Always Buy Organic)
Sweet bell peppers
Nectarines - imported
Blueberries - domestic
The Clean 15 (OK to Buy Conventional)
Cantaloupe - domestic
Download the Full List [PDF]
Read More: The EWG's 2012 Shopper's Guide to Pesticides in Produce
Related: It's True! Organic Fruits and Vegetables Taste Better