Total Maximum Daily Loads

DEQ works with partners in the Klamath Basin to protect and restore the health of local waterways. When rivers and streams exceed water quality standards set to protect people and aquatic life, DEQ develops a pollution reduction plan called a Total Maximum Daily Load, or TMDL. DEQ has developed TMDLs for several subbasins of the Klamath Basin.  

Current actions

September 2019

DEQ issued and EPA approved the Upper Klamath and Lost Subbasins Temperature TMDL.
 
Background
Oregon DEQ and the U.S. Environmental Protection Agency are working together to develop the Upper Klamath and Lost River Subbasins Temperature Total Maximum Daily Load.

The Upper Klamath and Lost Subbasins are within the Klamath Basin, in the southern portion of Oregon. Several stream segments of these subbasins do not currently meet state water quality standards for temperature.
 
The federal Clean Water Act requires DEQ to develop a plan with goals and pollution control targets for improving water quality in watersheds where water quality standards are not met. DEQ is doing this in the Upper Klamath and Lost River Subbasins by establishing limits known as Total Maximum Daily Loads for heat—the pollutant causing water quality standard violations.
 
Temperature impaired waterbodies in the Upper Klamath and Lost River Subbasins. Click for a larger view.

Upper Klamath and Lost River Subbasins Temperature TMDL

EPA Submittal Letter

EPA approval letter

Order Memo

​August 8, 2018 - TMDL Advisory Committee Meeting

August 27, 2018 - Tribal Coordination Meeting
September 12, 2018 - TMDL Advisory Committee Meeting
April 30, 2019 - TMDL Advisory Committee Meeting
May 6, 2019 - Tribal Coordination Meeting
 

 

March 2019

 

DEQ issued the Upper Klamath and Lost Subbasins Nutrient TMDL in January 2019, and EPA approved it for implementation in March 2019.

The Upper Klamath and Lost River Subbasins Nutrient TMDL addresses impairments of dissolved oxygen, ammonia, and chlorophyll-a in these subbasins. DEQ issued the most recent Nutrient TMDL in January 2019, and EPA approved it for implementation in March 2019. 

EPA approval letter

Upper Klamath and Lost River Subbasins Nutrient TMDL and Water Quality Management Plan, January 2019 

Upper Klamath and Lost River Subbasins TMDL, July 2018

Upper Klamath and Lost River Subbasins TMDL, 2017

Upper Klamath Order Memo

Upper Klamath Response to Comments

Upper Klamath Response to Petitions

 

TMDL issued by DEQ and submitted to EPA for approval on Dec. 21, 2010
 

Associated documents:

Memorandums of Agreement

​TMDL not started (minimal or no activity)

​Contact

Klamath Basin Coordinator:
Mike Hiatt, Klamath Falls
541-273-7002  
 
KlamathLoc2.PNG