Simply put: Consumer Reports tested 50 popular baby food brands and found worrisome amounts of arsenic and lead in some of them (including organic).
Scroll through the post for the breakdown.
The 15 baby foods that would pose a risk to a child who ate one or less servings per day
Beech-Nut Classics Sweet Potatoes
Earth's Best Organic Chicken & Brown Rice
Earth's Best Organic Sunny Days Snack Bars, Strawberry
Earth's Best Organic Sweet Potatoes, 1st Stage
Earth's Best Organic Whole Grain Rice Cereal
Earth's Best Turkey, Red Beans and Brown Rice