
EPA says it will propose drinking water limit for perchlorate, but only because court ordered it
The Environmental Protection Agency says it will propose a drinking water limit for perchlorate, a chemical in certain explosives. But the agency said it doesn’t think a limit will provide a major public health benefit and it’s doing so only because a court ordered it. Perchlorate affects the function of the thyroid and can be particularly damaging to the development of infants. The agency first said the substance needed to be regulated in 2011, but reversed itself during the first Trump administration and said the substance was less threatening and to fewer people than once thought.

