Berkeley Bowl is an independent super market that specializes in produce and also carries a wide array of organic and natural foods. They provide many varieties of produce and list where they are from and whether they are organic.
You'll find the strangest and most exotic fruits and vegetables.
You can decide what local means to you and where you want your food to come from. You can also clearly see labels for fair trade or organic or gluten free.
Berkeley Bowl also has the widest availability of "sustainable" products.