State Plan Actions
On Public Notice
Missouri State Implementation Plan Revision - Redesignation Request and Maintenance Plan for the St. Louis (MO) 2008 Ozone Standard Nonattainment Area
This SIP revision addresses redesignation requirements, per the Clean Air Act, for the St. Louis (MO) nonattainment area under the 2008 ozone standard. The St. Louis (MO) area counties of Franklin, Jefferson, St. Louis, and St. Charles as well as the city of St. Louis were designated nonattainment by the U.S. Environmental Protection Agency (EPA) on May 21, 2012, and monitoring data for 2013 to 2015 show the area has attained the standard of 75 parts per billion. The SIP revision includes a maintenance plan to demonstrate the St.Louis (MO) area will continue to meet the standard in future years as outlined in emission inventory projections, contingency measures, and motor vehicle budgets. Redesignation to attainment will occur when EPA gives final approval of this plan.
A public hearing is scheduled for this plan action on July 28, 2016. Comments about this plan action will be accepted through close of business on August 4, 2016.
Proposed for Adoption
None at this time.