"A federal court wants the Environmental Protection Agency (EPA) to report, with “precision and specificity,” how it plans to take a key step in implementing a 2015 smog pollution rule.

The demand from the Court of Appeals for the District of Columbia Circuit came after the EPA said in November which areas of the country comply with the regulation, but refused to say which areas do not comply.

Both kinds of designations were due Oct. 1, two years after the Obama administration finalized its major ground-level ozone rule. Environmentalists and Democratic states have sued the EPA to force the declarations known as “nonattainment” designations."

Timothy Cama reports for The Hill December 20, 2017. [2]