EPA Proposes to Redesignate Particulate Matter Attainment Area in Wyoming

Summary

The Environmental Protection Agency (EPA) is proposing to approve Wyoming's request to redesignate the Powder River Basin particulate matter attainment area, excluding the Kennecott/Puron Prevention of Significant Deterioration (PSD) Baseline area, and designate the Kennecott/Puron PSD Baseline area as a separate attainment area, as required by the Clean Air Act.