20 ppb listed in the EU document is for animal feed materials, not for the actual food. I

EU:

> For maize and all products derived from maize, including processed maize products, maximum limits (μg/kg) of 2,0 ppb for Aflatoxin B1 and 4,0 ppb for sum of Aflatoxins B1+B2+G1+G2 are set

> For Food (incoming material): Maximum limits (μg/kg) of 5,0 ppb for Aflatoxin B1 and 10,0 ppb for sum of Aflatoxins B1+B2+G1+G2.

> For feed: Feed materials 20 ppb for Aflatoxin B1

Right but aflatoxin comes from feed.

So presumably EU and US food has similarly low levels for things like milk, even though the max cutoffs for milk are different.