Missouri air quality rules get new definitions, but enforcement stays the same

The US environmental regulators are approving updated definitions and reference tables for Missouri's air quality rules. This change does not make the rules stricter or affect air quality.

This document is a routine administrative update. It clarifies language within existing regulations without changing how they are enforced or what they require. It does not make it easier or harder for companies to pollute, nor does it change the agency's ability to monitor or penalize them.