On October 1, US EPA issued much-anticipated final rule revisions intended to tighten the ground-level ozone (O3) national ambient air quality standard (NAAQS). US EPA will set the primary ozone NAAQS at 70 parts per billion (ppb). This new standard significantly lowers the existing 75 ppb standard set in 2008. This will push portions of the … Continue Reading
On November 25, 2014, US EPA released its long-awaited proposal to tighten the 8-hr ground-level ozone standard. The impacts of this rule are difficult to overstate. Unless changed, it will push much of the country into non-attainment, forcing state regulators to pursue emissions reductions while making permitting more difficult and restricting growth. A Smoggy Past: … Continue Reading
