On February 7, 2024, EPA finalized a rule lowering the primary annual National Ambient Air Quality Standard for PM2.5 to 9.00 ug/m3. This is a significant reduction from the current 12.00 ug/m3 standard and a victory for...more
PM NAAQS: Already behind schedule is perhaps the mostly widely impactful rule change EPA has proposed in many years: a lowering of the national ambient air quality standard (NAAQS) for fine particulate matter (PM2.5). EPA has...more
The first three quarters of 2023 have seen an unprecedented number of rulemakings under the Clean Air Act. The Biden administration has released a new suite of proposed rulemakings with a particular focus on climate change...more
EPA announced yesterday that it will “reconsider” the Trump EPA’s decision not to change the PM2.5 National Ambient Air Quality Standard. I’ve blogged numerous times about the growing body of evidence that exposure to...more
I’ve frequently discussed in recent years the mounting evidence for the need to lower the National Ambient Air Quality Standard for PM2.5. There is also substantial evidence that PM exposure is an environmental justice issue....more
One thing that is clear from the 2020 election: the Senate will remain closely divided, with slim majority control to be determined by the two January Senate runoff races in Georgia. President Elect Biden has announced the...more