Air Quality | Phillips 66| Public Comment Period Ends April 30, 2026

The Department of Environmental Quality has prepared a Draft Operating Permit #OP2619-20, for Phillips 66 Company – Billings Refinery.

Location:

• NW ¼ Section 2, Township 1 South, Range 26 East
• Yellowstone County

Associated Materials:

• OP2619-20
• TRD2619-20

Comment Period Ends:                             

• April 30, 2026 11:59PM

Send Comments To:

• John P. Proulx

OR

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

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Tags: Public Comment and Air