EPA moves to reclassify Denver to ‘serious’ ozone nonattainment

EPA is proposing to reclassify the Denver area’s ozone nonattainment status from “moderate” to “serious” -- as requested by Gov. Jared Polis (D) -- a step that if finalized would require additional pollution controls likely affecting oil and gas drillers. EPA in an Aug. 8 proposal notes that the area failed to meet the 2008 ozone national ambient air quality standard (NAAQS) by a July 2018 deadline and says the Clean Air Act requires the agency to determine whether areas...