Total Maximum Daily Loads

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 ​Water Quality Impairment Addressed ​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
Phosphorus, 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)
Tenmile Lakes Watershed
(South Coast)
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
1013
Lower Grande Ronde Subbasins (Grande Ronde)
Temperature, Bacteria
Temperature, Bacteria
09/24/2010
37
1050
Malheur River Basin (Malheur)
Temperature, Bacteria, Chlorophyll a
Temperature, Bacteria,  Phosphorus
12/03/2010
33
1083
John Day River Basin (John Day)
Temperature, Bacteria, DO, Biocriteria
Heat, Flow, Morphology, Shade, Bacteria
12/17/2010
123
1206