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  1. Home
  2. Permitting Under the Clean Air Act
  3. Clean Air Act Permitting Around the Nation

CAA Permitting in EPA's Mountains and Plains Region

EPA's Mountains and Plains region - Region 8 - serves Colorado, Montana, North Dakota, South Dakota, Utah, Wyoming, and 28 Tribal Nations

Actions of Interest

Permit Public Comment Opportunities

  • EPA-Issued Permits Open for Public Comment

Title V Petition Orders

  • None at this time

Notices of Terminations of EPA-Issued Permits

  • None at this time

Hotline Complaints

  • None at this time

Federal Implementation Plans

  • Final FIP for Oil and Natural Gas Sources on the Uintah and Ouray Indian Reservation
  • Advance Notice of Proposed Rulemaking - FIP to Establish a Bank for Ozone Precursor Emission Reduction Credits on Indian Country Lands Within the Uinta Basin Ozone Nonattainment Area
  • Final Amendments to the FIP for True Minor Oil and Natural Gas Sources in Indian Country
  • Final FIP for Oil and Natural Gas Well Production Facilities on the Fort Berthold Indian Reservation

Focus Topics for Region 8

  • Schedule a Pre-Application Meeting
  • Applying for EPA-Issued Tribal Minor New Source Review Permits
  • Applying for EPA-Issued Title V Operating Permits
  • EPA Issued Permits
  • EPA Pending Permits
  • EPA Oversight of State/Tribal/Local CAA Permitting Authorities

State/Tribal/Local Permitting Authorities

Region 8 has approved authority for these states and other jurisdictions to issue certain CAA permits.  Permit programs in all other areas of Region 8, primarily Indian country, are implemented directly by Region 8.

  • Colorado
  • Montana
  • North Dakota
  • South Dakota
  • Utah
  • Wyoming
  • Southern Ute Indian Tribe

Contact Information for Region 8 Air Permitting

Mailing Address: Permitting and Modeling Section (Mail Code 8ARD-AP-P), Air Permitting and Grants Management Branch, Air and Radiation Division, US EPA Region 8, 1595 Wynkoop Street, Denver, Colorado  80202
Permitting General e-mail: r8airpermitting@epa.gov
Air Permitting and Grants Management Branch Manager: Sara Loiacono (loiacono.sara@epa.gov), (303) 312-6626
Air Permitting and Modeling Section Manager: DJ Law (law.donald@epa.gov), (303) 312-7015

Responsibility Contact Phone
Tribal NSR and PSD Permits Lead Claudia Smith
(smith.claudia@epa.gov)
(303) 312-6520
Part 71 Operating Permits Lead Suman Kunwar
(kunwar.suman@epa.gov)
(303) 312-6095
State and Tribal Permitting Program Oversight DJ Law
(law.donald@epa.gov)
(303) 312-7015
PSD/NSR Permit Modelers

Gail Tonnesen
(tonnesen.gail@epa.gov)

Rebecca Matichuk  
(matichuk.rebecca@epa.gov)

(303) 312-6113

(303) 312-6867

Map of Region 8

Region 8 States

National Supporting Resources

  • CAA Permitting Home
  • New Source Review (NSR) Program
  • Title V Program
  • Tribal Permit Program
  • Outer Continental ​Shelf Permit Program
  • CAA Permitting Tools & ​Related Resources
  • Air Permitting Terms
  • Where You Live

Air Permitting Policy & Guidance

  • Search Documents
  • NSR Policy & Guidance
  • Title V Policy & Guidance
  • Title V Petition Database
  • Complying with Standards for Stationary Sources

Sign Up for Region 8's Mailing List

Sign Up to Receive Email from Region 8's Public Notice Distribution List

Permitting Under the Clean Air Act

  • Clean Air Act Permitting Around the Nation
    • New England Region (R1)
    • New York, New Jersey, Puerto Rico and U.S. Virgin Islands (R2)
    • Mid-Atlantic Region (R3)
    • Southeastern Region (R4)
    • Great Lakes Region (R5)
    • South Central Region (R6)
    • Midwest Region (R7)
    • Mountains and Plains Region (R8)
    • Pacific Southwest Region (R9)
      • About PSD Permitting in Region 9
      • Air Permit Delegation and PSD SIP Approval Status in Region 9
      • About NSR Permitting in Region 9
      • About Title V Permitting in Region 9
      • Electronic Permit System and Dashboards
      • Pending and Completed Permit Actions
      • Clean Air Act Permitting in Arizona
      • Clean Air Act Permitting in California
      • Clean Air Act Permitting in Hawai'i and Pacific Islands
      • Clean Air Act Permitting in Nevada
    • Pacific Northwest Region (R10)
  • CAA Permitting Tools & ​Related Resources
  • Outer Continental Shelf Air Permits
Contact Us About Permitting Under the Clean Air Act
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on May 5, 2025
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