Air Quality | NorthWestern Energy - Yellowstone County Generating Station| Public Comment Period Ends January 14, 2025

The Department of Environmental Quality has prepared a Draft Operating Permit #OP5261-00, for NorthWestern Energy- Yellowstone County Generating Station.

Location:

• 45.65973 latitude, -108.74620 longitude
• Yellowstone County

Associated Materials:

• OP5261-03 
• TRD5261-03

Comment Period Ends:                             

• January 14, 2026 11:59PM

Send Comments To:

• DEQAir@mt.gov

OR

• DEQ Air Quality Bureau
  PO Box 200901
  Helena MT 59620-0901

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Tags: Public Comment and Air