On September 7, 2016, the United States Environmental Protection Agency (EPA) issued a final rule updating the Cross-State Air Pollution Rule (CSAPR) ozone season trading program.  The rule promulgates more stringent ozone season NOx budgets in several states.  CSAPR was promulgated to implement the “good neighbor” provision of the Clean Air Act, which requires states to address the transport of pollution across state lines.
Continue Reading EPA Updates Cross-State Air Pollution Rule for the 2008 Ozone NAAQS

On October 1, 2015, EPA lowered the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to 70 parts per billion (ppb).  The new standard will replace the 2008 standard of 75 ppb, which EPA found inadequate to protect public health with an adequate margin of safety, as required under the Clean Air Act, and likely will result in changes in ozone attainment designations in a number of areas.
Continue Reading New Ozone Standards Expected to Push Many Areas Out of Attainment