Tag Archives: ozone

EPA Reduces Ground-Level Ozone Standard to 70 ppb

By Max E. Bridges

Environmental Update Post, 10-5-2015
Counties measuring ozone above 70 ppb based on 2012-2014 data. Source: EPA Ozone Maps found at http://www3.epa.gov/ozonepollution/maps.html

On October 1, the EPA lowered the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to 70 parts per billion (ppb), from the current level of 75 ppb set under President Bush in 2008. Ground-level ozone is a main component of smog and can produce a number of harmful effects on the respiratory system, including difficulty breathing and inflammation of the airways. In its rulemaking, the EPA estimates the public health benefits produced by lowering the standard will be $2.9 to $5.9 billion annually in 2025 and that they will include the prevention of 320,000 childhood asthma attacks a year. The EPA estimates that the lower standard will cause Industry to incur costs of $1.4 billion a year. Depending on the severity of the ozone problem, nonattainment areas will have from Continue reading EPA Reduces Ground-Level Ozone Standard to 70 ppb