Regulation & law · 21/09/2001Updated: 10/17/2026 · 1 min read

EPA Approves Revised Air Quality Implementation Plans for Colorado and Montana

Summary

The Environmental Protection Agency (EPA) has approved revisions to the Colorado and Montana State Implementation Plans, which include new procedures for ensuring that transportation projects do not exceed air quality limits, as required by the Clean Air Act.

Original source language: Federal Register — All DocumentsOpen original release →

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