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USGS NAS| HUC Code | Watershed Name | Occurrence | Source |
| 17080001 | Lower Columbia-Sandy | Current | NatureServe |
| 17080003 | Lower Columbia-Clatskanie | Current | NatureServe |
| 17080005 | Lower Cowlitz | Current | NatureServe |
| 17080006 | Lower Columbia | Current | NatureServe |
| 17090008 | Yamhill | Current | NatureServe |
| 17090010 | Tualatin | Current | NatureServe |
| 17090012 | Lower Willamette | Current | NatureServe |
| 17100101 | Hoh-Quillayute | Current | NatureServe |
| 17100102 | Queets-Quinault | Current | NatureServe |
| 17100103 | Upper Chehalis | Current | NatureServe |
| 17100104 | Lower Chehalis | Current | NatureServe |
| 17100105 | Grays Harbor | Current | NatureServe |
| 17100106 | Willpa Bay | Current | NatureServe |
| 17100201 | Necanicum | Current | NatureServe |
| 17100202 | Nehalem | Current | NatureServe |
| 17100203 | Wilson-Trask-Nestucca | Current | NatureServe |
| 17100204 | Siletz-Yaquina | Current | NatureServe |
| 17100205 | Alsea | Current | NatureServe |
| 17100206 | Siuslaw | Current | NatureServe |
| 17100207 | Siltcoos | Current | NatureServe |
| 17100303 | Umpqua | Current | NatureServe |
| 17100304 | Coos | Current | NatureServe |
| 17100305 | Coquille | Current | NatureServe |
| 17100306 | Sixes | Current | NatureServe |
| 17110002 | Straight of Georgia | Current | NatureServe |
| 17110004 | Nooksack | Current | NatureServe |
| 17110005 | Upper Skagit | Current | NatureServe |
| 17110006 | Sauk | Current | NatureServe |
| 17110007 | Lower Skagit | Current | NatureServe |
| 17110008 | Stillaguamish | Current | NatureServe |
| 17110009 | Skykomish | Current | NatureServe |
| 17110010 | Snoqualmie | Current | NatureServe |
| 17110011 | Snohomish | Current | NatureServe |
| 17110014 | Puyallup | Current | NatureServe |
| 17110015 | Nisqually | Current | NatureServe |
| 17110016 | Deschutes | Current | NatureServe |
| 17110017 | Skokomish | Current | NatureServe |
| 17110018 | Hood Canal | Current | NatureServe |
| 17110019 | Puget Sound | Current | NatureServe |
| 17110020 | Dungeness-Elwha | Current | NatureServe |
| 17110021 | Crescent-Hoko | Current | NatureServe |
| 18010101 | Smith | Current | NatureServe |
| 18010102 | Mad-Redwood | Historic | NatureServe |
| 18010105 | Lower Eel | Historic | NatureServe |
| 18010106 | South Fork Eel | Historic | NatureServe |
| 18010107 | Mattole | Historic | NatureServe |
| 18010108 | Big-Navarro-Garcia | Historic | NatureServe |
| 18010109 | Gualala-Salmon | Historic | NatureServe |
| 18010110 | Russian | Historic | NatureServe |
| 18010111 | Bodega Bay | Historic | NatureServe |
| 18010209 | Lower Klamath | Current | NatureServe |
| 18010211 | Trinity | Current | NatureServe |
| 18020103 | Sacramento-Lower Thomes | Historic | NatureServe |
| 18020104 | Sacramento-Stone Corral | Historic | NatureServe |
| 18020109 | Lower Sacramento | Historic | NatureServe |
| 18020118 | Upper Cow-Battle | Historic | NatureServe |
| 18040003 | San Joaquin Delta | Historic | NatureServe |
| 18050001 | Suisun Bay | Historic | NatureServe |
| 18050002 | San Pablo Bay | Historic | NatureServe |
| 18050005 | Tomales-Drake Bays | Historic | NatureServe |