Eastern States Eye Daily NOx Controls To Curb Interstate Ozone Transport

摘要

Eastern states are debating the need for short-term, potentially daily, limits on power plants' emissions of ozone-forming nitrogen oxides (NOx) as a key strategy for curbing interstate transport of NOx, as uncertainty lingers over EPA's efforts to address cross-state air pollution with a comprehensive rule that can pass legal muster. EPA next month at Supreme Court oral arguments will urge the justices to reverse an appellate ruling that scrapped its Cross-State Air Pollution Rule (CSAPR), the latest of several agency attempts in recent years to impose pollution limits on upwind states whose transported emissions are hindering downwind states' ability to attain the federal ozone national ambient air quality standard (NAAQS), but the outcome of that decision could be months away.