Federal Register #EPA-R07-OAR-2026-0463

EPA Clean Data Determination for Missouri Portion of St. Louis Nonattainment Area (2015 Ozone Standard)

This notice announces the EPA's final rule regarding air quality standards in the St. Louis, MO-IL area: - Government Buyer: - Environmental Protection Agency (EPA) - Missouri Department of Natural Resources (MoDNR) referenced as submitting agency - No OEMs or commercial vendors are involved; this is a regulatory action - No products or services are being requested or procured - Key Details: - EPA has determined the Missouri portion of the St. Louis nonattainment area meets the 2015 8-hour ozone NAAQS - Determination is based on certified ambient air monitoring data for the 2023-2025 design value period - Missouri's clean data determination request and a portion of its exceptional events request have been approved - Certain nonattainment area planning requirements for Missouri are suspended as long as the area continues to meet the standard - A similar determination is being finalized for the Illinois portion of the area - No procurement, contract, or acquisition activity is associated with this notice

Description

The Environmental Protection Agency (EPA) has determined that the Missouri portion of the St. Louis, MO-IL bi-state nonattainment area has achieved clean data for the 2015 8-hour ozone National Ambient Air Quality Standard (NAAQS). This determination is based on complete, quality-assured, and certified ambient air monitoring data for the 2023-2025 design value period. The EPA is approving Missouri's clean data determination request and concurrence on a portion of the exceptional events request submitted by the Missouri Department of Natural Resources. This final determination suspends certain nonattainment area planning requirements for Missouri as long as the area continues to meet the 2015 ozone NAAQS.

View original listing