Regulation & law · 15/12/1997Updated: 10/17/2026 · 1 min read
EPA Approves 1990 CO Emission Inventories for Montana Cities
Summary
The Environmental Protection Agency (EPA) has approved the 1990 base year carbon monoxide emission inventories for Missoula, Billings, and Great Falls, Montana, to meet the Clean Air Act requirements.
Original source language: Federal Register — All DocumentsOpen original release →