Bloomberg reports that California officials will screen milk produced in the state for signs of radiation contamination transmitted by grass-eating cows. California authorities are reassuring residents that any radiation drifting across the ocean from Japan’s earthquake-damaged nuclear reactors would not pose any health threat. Officials are monitoring radiation levels and had not detected any rise as of yesterday. Dean Foods, the largest U.S. dairy processor, which has not been directly affected by the situation in Japan, is in close contact with dairy organizations working with U.S. government agencies to make sure the dairy industry is taking all appropriate action. California is the biggest U.S. milk-producing state in the U.S., according to the United States Department of Agriculture. Dean Foods gets a significant amount of milk from California, Esposito said.