"According to the EPA’s statement, milk, water and other select products were tested for radiation. These very low amounts were anticipated, and will likely continue to appear over the next few days of testing. Federal and state government officials, and medical experts from around the country continue to underscore that minuscule levels of radiation detected do not pose a health concern to the U.S. food system, including U.S. dairy products."
We are exposed to radiation everywhere in our lives and after reading more about it I am more concerned with radiation from electronics than I am about radiation in our food.
Check out "The Wife of a Dairyman" blog here for her insight on this information and a lot of other excellent posts on being a dairy farmer.