States Face Uncertainty On Strategies For Attaining Stricter Ozone NAAQS

States face uncertainty over how they will attain a potentially stricter ozone national ambient air quality standard (NAAQS) that EPA could finalize in October, as EPA appears to be offering few examples of strategies states could use to cut ozone beyond existing programs, such as its vehicle air rules and “exceptional” events air policy. EPA says in its recent proposal to tighten the ozone NAAQS that it will be up to states to determine how to attain a tighter standard...