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
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	Sprague Upper Klamath Lake Upper Klamath and Lost River Williamson
Malheur River	Malheur River Basin
Mid Coast	Alsea Siletz-Yaquina Siltcoos Siuslaw
Middle Columbia-Hood	Miles Creeks Western Hood
North Coast/Lower Columbia	Lower Columbia-Clatskanie Lower Columbia-Youngs Necanicum Nehalem Wilson-Trask-Nestucca
Oregon Closed Lakes Basin	Alvord Lake Donner und Blitzen Goose Lake Guano, Nevada Harney-Malheur Lake Lake Albert Silver Silvies Summer Lake Thousand-Virgin Upper Quinn Warner Lakes
Owyhee	Crooked-Rattlesnake Subbasin East Little Owyhee Subbasin/South Fork Owyhee Jordan Subbasin Lower Owyhee Subbasin Middle Owyhee Subbasin Middle Snake-Succor Subbasin
Powder	Brownlee Reservoir Subbasin Burnt 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 Walla Walla Willow Creek Subbasin
Umpqua	North Umpqua Subbasin South Umpqua Subbasin Umpqua Subbasin
Willamette	Columbia Slough Watershed Molalla-Pudding Subbasin Tualatin Subbasin Yamhill Subbasin

Oregon Basin/Subbasin List