Certain organic pesticides, which generally take less time to break down in the environment than synthetic and so tend to need larger doses, are allowed on cert

Certain organic pesticides, which generally take less time to break down in the environment than synthetic and so tend to need larger doses, are allowed on certified organic farms. Also there's a chance of things like E. coli from contact with manure (commonly used as a fertilizer, although it's supposed to be aged and/or treated as part of the organic certification in the US), or just from bacteria normally present in soil. So, make sure you wash fruits and vegetables before eating, whether grown on organic-certified farms or not! (EDIT - s/more time/less time/)