Energy & environment · 20/12/2010

EPA Approves Mississippi's Revised Prevention of Significant Deterioration Plan to Address Nitrogen Oxides as Ozone Precursor

The US Environmental Protection Agency (EPA) has finalized the approval of a portion of Mississippi's revised State Implementation Plan (SIP) to incorporate nitrogen oxides (NOx) as a precursor to ozone, in compliance with federal regulations, as part of the 1997 8-Hour Ozone National Ambient Air Quality Standards (NAAQS) Implementation Rule-Phase II.