Oregon DEQ: Water Quality - Total Maximum Daily Loads (TMDLs) Program

Basin	Subbasins
Columbia River
Deschutes	Beaver-South Fork Little Deschutes Lower Crooked Lower Deschutes Trout Upper Crooked Upper Deschutes
Goose and Summer Lakes	Goose Lake Lake Albert Summer Lake Warner Lakes
Grande Ronde	Imnaha Lower Grande Ronde Upper Grande Ronde Wallowa
John Day	Lower John Day Middle Fork John Day North Fork John Day Upper John Day
Klamath	Lost Sprague Upper Klamath Lake Upper Klamath Williamson
Malheur Lake	Alvord Lake Donner und Blitzen Guano, Nevada Harney-Malheur Lake Silver Silvies Thousand-Virgin
Malheur River	Bully Lower Malheur Middle Snake-Payette Upper Malheur Willow-Malheur
Mid Coast	Alsea Siletz-Yaquina Siltcoos Siuslaw
Middle Columbia-Hood	Miles Creeks Western Hood
North Coast/Lower Columbia River	Lower Columbia-Clatskanie Lower Columbia-Youngs Necanicum Nehalem Wilson-Trask-Nestucca
Owyhee	Crooked-Rattlesnake Subbasin East Little Owyhee Subbasin/South Fork Owyhee Jordan Subbasin Lower Owyhee Subbasin Middle Owyhee Subbasin Middle Snake-Succor Subbasin Upper Quinn Subbasin
Powder	Brownlee Reservoir Subbasin Burnt Subbasin Middle Snake-Payette Subbasin Powder Subbasin
Rogue	Applegate Subbasin Illinois Subbasin Lower Rogue Subbasin Middle Rogue Subbasin Upper Rogue Subbasin
Sandy
Snake River/Hells Canyon
South Coast	Chetco Subbasin Coos Subbasin Coquille Subbasin Sixes Subbasin
Umatilla	Umatilla Subbasin Willow Creek Subbasin
Umpqua	North Umpqua Subbasin South Umpqua Subbasin Umpqua Subbasin
Walla Walla
Willamette	Columbia Slough Watershed Molalla-Pudding Subbasin Tualatin Subbasin Yamhill Subbasin

Oregon Basin/Subbasin List