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Total Maximum Daily Loads (TMDLs) Program 


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Oregon TMDLs Approved by EPA - May 2000 through

Total TMDL segments completed to date as required by the February 1, 2000 MOA between DEQ and EPA: 1,206
Waterbody (Basin) Water Quality Impairment Addressed Allocated Pollutant or Surrogate USEPA
Approval Date
Completed TMDL Segments by Basin Completed TMDL Segments (cumulative)
Upper Grande Ronde River Subbasin
(Grande Ronde)
Temperature, pH, Algae, DO, Sedimentation Temperature, Sediment, Nitrogen, Phosphorous 05/03/2000 73 73
Upper South Fork Coquille Watershed
(South Coast)
Temperature Temperature 03/23/2001 4 77
Umatilla River Basin
(Umatilla)
Temperature, pH, Sedimentation, Turbidity, Aquatic Weeds, Algae Temperature, pH, Sedimentation, Turbidity, Aquatic Weeds, Algae 05/09/2001 45 122
Tillamook Bay Watershed
(North Coast)
Temperature, Bacteria Temperature, Bacteria 07/31/2001 39 161
Tualatin Subbasin
(Willamette)
Temperature, Bacteria, Dissolved Oxygen, Algae, pH Temperature, Bacteria, Dissolved Oxygen, Settleable Volatile Solids, Ammonia, Chlorophyll a, pH, Phosphorus 08/07/2001 102 263
Tualatin Subbasin (Willamette) Dissolved Oxygen, Algae, pH Ammonia, Phosphorus 12/14/2012 102 263
Little River Watershed
(North Umpqua)
Temperature, pH, Sedimentation Temperature, pH, Sediment 01/29/2002 16 279
Western Hood Subbasin
(Hood)
Temperature Temperature 01/30/2002 7 286
Nestucca Bay Watershed
(North Coast)
Temperature, Bacteria, Sediment Temperature, Bacteria, Sediment 05/13/2002 6 292
Lower Sucker Creek Watershed
(Illinois)
Temperature Temperature 05/30/2002 3 295
Lobster Creek Watershed
(Rogue)
Temperature Temperature 06/13/2002 3 298
Upper Klamath Lake Drainage
(Klamath)
Temperature, pH, DO, Chlorophyll a Temperature, pH, DO, Chlorophyll a 08/07/2002 32 330
Lower Columbia River
(Lower Columbia)
Total Dissolved Gas Total Dissolved Gas 11/18/2002 7 337
North Coast Subbasins
(North Coast)
Temperature, Bacteria Temperature, Bacteria 08/20/2003 42 379
Alvord Lake Subbasin
(Malheur Lake)
Temperature, Dissolved Oxygen Temperature, Dissolved Oxygen 02/11/2004 7 386
Applegate Subbasin
(Rogue)
Temperature, Sediment Temperature, Sediment 02/11/2004 14 400
Snake River-Hells Canyon
(Snake River)
Temperature, Total Dissolved Gas, DDT, DDE, DDD, Dieldrin Temperature, Total Dissolved Gas, DDT, DDE, DDD, Dieldrin 03/01/2004 15 415
Snake River-Hells Canyon - Revised
(Snake River)
Phosphorus, Sediment, Dissolved Oxygen Temperature, Sediment, Dissolved Oxygen 09/09/2004 5 420
Sandy River Basin
(Sandy)
Temperature, Bacteria Temperature, Bacteria 04/14/2005 8 428
Walla Walla Subbasin
(Walla Walla)
Temperature Temperature 09/29/2005 4 432
Willamette Basin
(Willamette)
Temperature, Bacteria, Mercury, Dissolved Oxygen, Dieldrin, DDT, Turbidity Temperature, Bacteria, Mercury, Dissolved Oxygen, Dieldrin, DDT, Turbidity 09/29/2006 207 639
Willow Creek Subbasin
(Umatilla)
Temperature, pH, Bacteria Temperature, pH (Nutrients), and Bacteria 02/19/2007 4 643
Umpqua Basin
(Umpqua)
Temperature, pH, Bacteria, DO, Aquatic Weeds, Chlorophyll a, Biological Criteria Temperature, Nutrients, and Bacteria 04/12/2007 186 829
Tenmile Lakes Watershed
(South Coast)
Aquatic Weeds, Algae Nutrients, Sedimentation, and Invasive Weed Management 05/31/2007 2 831
Bear Creek Watershed
(Rogue)
Temperature, Bacteria, Sedimentation Temperature, Bacteria, Sedimentation 10/2/2007 32 863
Rogue River Basin (Rogue)

Temperature, Bacteria

Temperature, Bacteria

12/29/2008 109 972
Molalla-Pudding Subbasin(Willamette)

Temperature, Bacteria, Pesticides, Nitrate, Iron

Temperature, Bacteria, Pesticides, Nitrate, Iron

12/31/2008

26 998
Miles Creeks Subbasin (Middle Columbia-Hood) Temperature Temperature 02/05/2009 15 1,013
Lower Grande Ronde Subbasins (Grande Ronde) Temperature, Bacteria Temperature, Bacteria 09/24/2010 37 1,050
Malheur River Basin (Malheur) Temperature, Bacteria, Chlorophyll a Temperature, Bacteria,  Phosphorus 12/03/2010 33 1,083
John Day River Basin (John Day) Temperature, Bacteria, DO, Biocriteria Heat, Flow, Morphology, Shade, Bacteria 12/17/2010 123 1,206
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For more information about DEQ's Total Maximum Daily Loads (TMDLs) Progam contact Gene Foster by phone at 503-229-5325 or by email, or contact the appropriate Basin Coordinator.

Oregon Department of Environmental Quality
Headquarters: 811 SW Sixth Ave., Portland, OR 97204-1390
Phone: 503-229-5696 or toll free in Oregon 1-800-452-4011
Oregon Telecommunications Relay Service: 1-800-735-2900  FAX: 503-229-6124

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the State of Oregon and the Environmental Protection Agency.

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