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Clean Air Act Permitting in Washington

Clean Air Act permitting in Washington is the shared responsibility of EPA Region 10 and the agencies listed below.

Indian Country

Permitting Agency Types of Permits Issued
EPA Region 10
  • Prevention of Significant Deterioration (PSD) construction permits
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits
  • Non-Title V operating permits

Outer Continental Shelf (more than 3 miles off Washington coastline)

Permitting Agency Types of Permits Issued
EPA Region 10
  • Prevention of Significant Deterioration (PSD) construction permits
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits

Note: mNSR and nNSR do not apply more than 28 miles off of the coast line.


All Other Areas in Washington

Permitting Agency Types of Permits Issued
Washington Energy Facility Site Evaluation Council (EFSEC) Exit

For energy projects greater than 350 megawatts:

  • Prevention of Significant Deterioration (PSD) construction permits
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits
Washington Department of Ecology Exit
  • Prevention of Significant Deterioration (PSD) construction permits not under EFSEC jurisdiction (see above)
  • For pulp mills, aluminum mills, and Hanford:
    • Minor New Source Review (mNSR) construction permits
    • Nonattainment New Source Review (nNSR) construction permits
    • Title V operating permits
  • For Adams, Asotin, Chelan, Columbia, Douglas, Ferry, Franklin, Garfield, Grant, Kittitas, Lincoln, Okanogan, Pend Oreille, San Juan, Stevens, Walla Walla and Whitman Counties:
    • Minor New Source Review (mNSR) construction permits
    • Nonattainment New Source Review (nNSR) construction permits
    • Title V operating permits
Benton Clean Air Agency Exit(serving Benton County)
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits
Olympic Region Clean Air Agency Exit(serving Clallam, Grays Harbor, Jefferson, Mason, Pacific and Thurston Counties)
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits
Southwest Clean Air Agency Exit (serving Clark, Cowlitz, Lewis, Skamania and Wahkiakum Counties)
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits
Puget Sound Clean Air Agency Exit (serving King, Kitsap, Pierce and Snohomish Counties)
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits
Northwest Clean Air Agency Exit (serving Island, Skagit and Whatcom Counties)
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits
Spokane Regional Clean Air Agency Exit(serving Spokane County)
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits
Yakima Regional Clean Air Agency Exit (serving Yakima County)
  • Minor New Source Review (mNSR) construction permits
  • Nonattainment New Source Review (nNSR) construction permits
  • Title V operating permits