| Covered Permits | Permitting Agency |
- Prevention of Significant Deterioration (PSD), nNSR, mNSR and Title V for energy projects >350 MW
| Energy Facility Site Evaluation Council (EFSEC) |
- All other PSD projects
- mNSR, nNSR and Title V for pulp mills, aluminum mills and Hanford
- mNSR, nNSR and Title V in the following counties: Adams, Asotin, Chelan, Columbia, Douglas, Ferry, Franklin, Garfield, Grant, Kittitas, Lincoln, Okanogan, Pend Oreille, San Juan, Stevens, Walla Walla and Whitman
| Washington Department of Ecology (WDOE) |
- mNSR, nNSR and Title V in Benton County
| Benton Clean Air Agency (BCAA) |
- mNSR, nNSR and Title V in Clallam, Grays Harbor, Jefferson, Mason, Pacific and Thurston Counties
| Olympic Region Clean Air Agency (ORCAA) |
- mNSR, nNSR and Title V in Clark, Cowlitz, Lewis, Skamania and Wahkiakum Counties
| Southwest Clean Air Agency (SWCAA) |
- mNSR, nNSR and Title V in King, Kitsap, Pierce and Snohomish Counties
| Puget Sound Clean Air Agency (PSCAA) |
- mNSR, nNSR and Title V in Island, Skagit and Whatcom Counties
| Northwest Clean Air Agency (NWCAA) |
- mNSR, nNSR and Title V in Spokane County
| Spokane Regional Clean Air Agency (SRCAA) |
- mNSR, nNSR and Title V in Yakima County
| Yakima Regional Clean Air Agency (YRCAA) |