EPA approves cleaner air data for Illinois portion of St. Louis area
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Table of Contents
The Environmental Protection Agency (EPA) has finalized a determination that the Illinois side of the St. Louis metropolitan area meets the 2015 ozone standards. This decision is based on air quality monitoring data collected between 2023 and 2025.
Why it matters: This is primarily an administrative action that updates the official air quality status of a specific region. It removes the immediate requirement for local and state agencies to develop and submit detailed pollution control plans for the 2015 ozone standard.
Who it affects
- Illinois Environmental Protection Agency
This information comes from a final rule published by the EPA; readers should consult the Federal Register for full technical details before relying on it.
Agency: Environmental Protection Agency
Source: Federal Register — read the official document