Regulation & law · 06/12/1999Updated: 10/17/2026 · 1 min read

EPA Approves Montana's Air Quality Implementation Plans

Summary

The Environmental Protection Agency (EPA) is proposing to approve the State of Montana's revisions to its air quality implementation plans, which update the state's particulate matter and carbon monoxide standards, without prior public comment, due to the noncontroversial nature of the revisions.

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

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