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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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Hidden Lake, Glacier National Park © Pam Gallichio

EPA Region 8 Map

EPA Region 8 Map Map of EPA Region 8, which contains Montana, North Dakota, Utah, Wyoming, South Dakota, and Colorado. Montana North Dakota Utah Wyoming South Dakota Colorado

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

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Related Information
  • Media Office Inquiries
  • Region 8 Administrator
  • Organization Chart

Job Openings in Region 8

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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
  • North Dakota
  • South Dakota
  • Utah
  • Wyoming

Region 8 News

  • EPA declares Salt Lake City and Provo areas meet air quality standards after 15 years

  • In Ceremony with North Dakota Governor, EPA finalizes approval of North Dakota coal combustion residuals permit program

  • EPA issues final approval for copper mining project in Utah

  • EPA partners with Powell Economic Partnership to strengthen outdoor recreation economy

  • In Ceremony with Wyoming Governor, EPA proposes approval of Wyoming coal residuals permit program

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 the Whiterocks Diversion Rehabilitation Project on the Uintah and Ouray Reservation

  • Opportunity to Comment on Draft Permit for the St. Ignatius South Side Wastewater Treatment Facility in Montana

  • EPA Begins Sixth Five Year Review of Silver Bow Creek/Butte Area Superfund site

  • EPA Begins Sixth Five-Year Review for the Minot Landfill Superfund Site

  • Seventh Five-Year Review of Anaconda Co. Smelter Superfund Site Complete

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U.S. EPA Mountains and Plains Region

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Last updated on November 25, 2025
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U.S. EPA Mountains and Plains Region 8