CASAC’s Call For Tighter PM Limits Could Pose Problems In Multiple States

EPA’s adoption of substantially tighter federal limits for fine particulate matter (PM2.5), as clean air science advisers are urging, would pose challenges for multiple states and especially California, state sources say, though some regions in the Golden State and elsewhere may have to rely on new federal rules to help attain any new PM2.5 standard. “California definitely has the steepest hill on this but they’re not the only ones -- Ohio, Pennsylvania, Idaho and Alaska have some issues, and if...