SunCoke Energy Middletown Operations Exceeds S02 Limits on March 2-3, 2012
The National Ambient Air Quality Standard for Sulfur Dioxide is 75 parts per billion averaged hourly. The concentrations documented on the EPA website are high one hour averages. Units are parts per billion. SunCoke Exceeded the limits on March 2nd and 3rd - limits were 156 and 133 for those days.