EPA listens to NAS on perchlorate standard
EPA listens to NAS on perchlorate standard
The Environmental Protection Agency has set a reference dose for perchlorate, a chemical that has been found in lettuce, milk and now in breast milk. The new safe dose, which translates into 24.5 parts per billion in drinking water, is what the National Academy of Sciences recommended in January, a dramatic change from what the EPA had originally proposed. The EPA issued a preliminary recommendation two years ago for an exposure level of one ppb, a level the Pentagon attacked as too restrictive. Some state authorities have been urging defense contractors to pay for the cleanup of the rocket