The U.S. Food and Drug Administration and the Environmental Protection Agency have reported small amounts of radioactive iodine in milk tested in Spokane, WA. The sample contained 0.8 picocuries per liter of iodine-131. The agencies say this amount is "far below the levels of public health concern," and are expected to drop rapidly due to a very short half-life.
PositiveTip: Fortunately, there is little to worry about this time. Should this occur again it would be wise to skip the milk, and find an alternative.