The Missouri Department of Natural Resources is proposing revisions to the Missouri State Implementation Plan (SIP) to include a proposed maintenance plan for the St. Louis nonattainment area. The department invites the public to review and offer written comments on the proposed plan until Feb. 3, 2022. All comments must be received or postmarked by 5 p.m. The public can review the proposed revisions below.
Written comments may be submitted by mail to Missouri Department of Natural Resources, Air Pollution Control Program, ATTN: Air Quality Planning Section Chief, PO Box 176, Jefferson City, MO 65102-0176 or by email to apcpsip@dnr.mo.gov. The department will hold a public hearing about the proposed plan during the Missouri Air Conservation Commission meeting on Jan. 27, 2022. Please follow the hearing link for more information.
The proposed plan addresses the Clean Air Act requirements for maintenance plans for the Missouri portion of the St. Louis nonattainment area, under the 2015 ozone standard. Monitoring data for the 2019, 2020 and 2021 years demonstrates the area has come into compliance with the 70 parts per billion standard. The U.S. Environmental Protection Agency (EPA) is required to approve this maintenance plan before EPA can redesignate the area to attainment. The department intends to submit a formal redesignation request for the area at the same time as this plan.