the dirty dozen - produce you should always buy organic

Pesticide residues are commonly found on conventionally-grown produce even after it’s been washed and peeled. For this reason, people are turning to organic produce to avoid any harmful effects of leftover pesticides.

Every year, a non-profit called the Environmental Working Group publishes the top twelve produce items with the highest amounts of pesticides found after testing.

Here’s their Dirty Dozen list for 2018:
1) Strawberries
2) Spinach
3) Nectarines
4) Apples
5) Grapes
6) Peaches
7) Cherries
8) Pears
9) Tomatoes
10) Celery
11) Potatoes
12) Sweet Bell Peppers

SOURCES:
https://www.ewg.org/foodnews/dirty-dozen.php