The Missouri Department of Natural Resources’ Air Pollution Control Program is proposing area boundary recommendations for the 2024 Annual PM2.5 (Fine Particulate Matter) Standard. The department invites the public to review and offer written comments on the proposed area boundary designation until Feb. 6, 2025. The department will hold a public hearing about the proposed request before the Missouri Air Conservation Commission. Please follow the hearing link below for more information.
Written comments may be submitted by mail to Missouri Department of Natural Resources, Air Pollution Control Program, ATTN: Air Quality Planning Section Chief, P.O. Box 176, Jefferson City, MO 65102‐0176 or by email to apcpsip@dnr.mo.gov. Comments submitted by email are limited to 3MB in size. Comments larger than 3 MB need to be submitted by mail to the address above or call 573‐751‐4817 to make other arrangements.
These recommendations are according to Clean Air Act Section 107(d)(1) and follow EPA guidance. The proposal includes evaluating monitoring data, emissions, meteorology and other factors to recommend designations (e.g. attainment, nonattainment, unclassifiable) for each area of the state. Nonattainment recommendations are for areas with monitored violations of the standard or any areas contributing to a monitored violation. All other areas are recommended to be designated attainment/unclassifiable. The department's Air Program intends to submit the recommendations to the U.S. Environmental Protection Agency (EPA) by March 31, 2025, and EPA is anticipated to designate areas by Feb. 6, 2026.