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EPA Region 8 (Mountains and Plains)

Serving Colorado, Montana, North Dakota, South Dakota, Utah, Wyoming and 28 Tribal Nations

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Pronghorn couple in Yellowstone National Park. © Larry Wymer

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Related Information
  • Media Office Inquiries
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  • Contact Region 8
    303-312-6312 or in the Region 8 states 800-227-8917
  • Español: 202-564-9924
  • Criminal Investigation Division: 303-312-6134 (24-hour hotline)
  • TTY Call-in Line: 800-439-2370
    EPA Business Partner, Mass Relay (sign language interpreters, access needs)
  • EPA Hotlines (Nationwide)
  • Region 8 Laboratory
  • Visiting Region 8
  • Region 8 Information Center
  • FOIA Requests
  • Environmental Sustainability at the Region 8 Headquarters Building 

Mailing Addresses

US EPA, Region 8
1595 Wynkoop Street
Denver, CO 80202-1129

EPA Montana Operations Office
Federal Building
10 West 15th Street, Suite 3200
Helena, MT 59626
406-457-5000
866-457-2690 (toll free)

EPA Regional Laboratory
Denver Federal Center, Building 25
Lakewood, CO 80225

Popular Resources

  • Silver Bow Creek/Butte Area Superfund Site
  • Bonita Peak Mining District Superfund Site
  • Colorado Smelter Superfund Site
  • Brownfields 
  • Drinking Water
  • Superfund sites in Colorado, Montana, North Dakota, South Dakota, Utah, and Wyoming
  • Tribal Affairs Branch

Environmental Info

Get state environmental info on the following topics: Air, Water, Enforcement, Cleanups, Toxic Releases, Pesticides and Grants.

  • Colorado
  • Montana
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  • Utah
  • Wyoming

Region 8 News

  • EPA proposes risk reduction plan for Billings PCE site

  • EPA announces $500,000 in funding to assess and redevelop properties in Wyoming

  • EPA announces $2M in funding to assess and cleanup land in Salt Lake City, UT

  • EPA announces over $11.6M in funding to assess and clean up communities across Colorado

  • EPA announces $8M in funding to assess and clean up communities across Montana

Additional News

All Region 8 News Releases June 2019–Current 

Get EPA Region 8 News by Email

Region 8 Public Notices

  • Water Quality Certification for Two Bridge Replacement Projects on the Rosebud Sioux Tribe Indian Reservation

  • Public Notice: Proposed Plan for Vapor Intrusion (OU1) for the Billings PCE Superfund Site in

  • St. Vrain Sanitation District

  • Opportunity to Comment on Draft Permit for the Riverview Estates Wastewater Treatment Facility in North Dakota

  • Water Quality Certification of 2026 Nationwide Permits in Wyoming

  • Currently on page 1
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U.S. EPA Mountains and Plains Region

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Last updated on July 24, 2025
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U.S. EPA Mountains and Plains Region 8