Federal Register #EPA-R05-OAR-2026-0695

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

This notice from the Environmental Protection Agency (EPA) Region 5 announces a Clean Data Determination for the Illinois portion of the St. Louis, MO-IL nonattainment area for the 2015 ozone National Ambient Air Quality Standards (NAAQS). - Government Buyer: - Environmental Protection Agency (EPA), Region 5 - No OEMs, vendors, products, or services are being procured or awarded in this notice - Key Details: - The determination is based on certified air monitoring data showing attainment of the 2015 ozone NAAQS - Relies on concurrence with an exceptional events request from the Illinois Environmental Protection Agency - As a result, certain State Implementation Plan (SIP) requirements are suspended for the Illinois portion of the St. Louis area as long as the area continues to meet the ozone standard - No procurement activity, contract value, or product/service line items are associated with this notice

Description

The Environmental Protection Agency (EPA) is determining under the Clean Air Act (CAA) that the Illinois portion of the St. Louis, MO-IL nonattainment area has achieved clean data for the 2015 ozone National Ambient Air Quality Standards (NAAQS). This determination is based on quality-assured and certified ambient air monitoring data for the 2023-2025 design value period showing attainment of the 2015 ozone NAAQS. The EPA also concurs with an exceptional events request submitted by the Illinois EPA. As a result, the EPA is suspending requirements for the area to submit attainment demonstrations and related State Implementation Plans (SIPs) as long as the area continues to meet the standard.

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