EPA Publishes New PM NAAQS Standard
EPA has announced their new PM NAAQS Standard. As expected, they have significantly lowered the primary PM2.5 annual limit from 12 ug/m3 to 9 ug/m3. The good news is that they did not change the primary 24-hour PM2.5 or PM10 limits, or any of the secondary limits. We are digging through the details of this [...]