Montana Department of Environmental Quality About Us Permitting & Operator Assistance Public Participation

Air Quality | Phillips 66 Company - Billings Refinery

  • May 08 2026

The Department of Environmental Quality has prepared a Proposed Permit regarding 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:

EPA Review Period Ends: 

  • June 22, 202611:59PM

Contact: John P. Proulx

Accommodation statement:

DEQ will make reasonable accommodations for persons with disabilities who wish to participate in this public participation process or need an alternative accessible format of this notice. If you require an accommodation, contact the department no later than 5:00 P.M. on June 12, 2026, to advise us of the nature of the accommodation that you need. Please contact the Department of Environmental Quality at P.O. Box 200901, Helena, Montana 59620-0901; phone (406)444-3490; or e-mail_deqair@mt.gov.

Tags: Air and Public Notice