TMDL Project Information for the Columbia River | WA State Department of Ecology

Washington State Department of Ecology

WATER QUALITY IMPROVEMENT PROJECTS (TMDLs)

RELATED ECOLOGY PROGRAMS

Water Quality

Columbia River projects

The following table lists overview information for water quality improvement projects (also known as total maximum daily loads, or TMDLs) for the Columbia River. Please use links (where available) for more information on a project.

To get additional information about the water bodies in the Columbia River system please use the Water Quality Assessment Simple Query Tool.

See map for WRIAs in the Columbia River system.

Waterbody Name	Pollutant(s)	Status	TMDL Lead(s)
Columbia River Tributary: Snake River, Lower	Dioxin	TMDL Issued by U.S. EPA	Andrew Kolosseus 360-407-7543
Columbia River Segment: Columbia River, Lower	Total Dissolved Gas	Approved	Andrew Kolosseus 360-407-7543
Columbia River Segment: Columbia River, Middle	Total Dissolved Gas	Approved	Andrew Kolosseus 360-407-7543
Columbia and Snake River Mainstem (EPA web site)	Temperature	"Delayed to allow necessary discussions and information exchange." (per EPA web site)	Marylou Soscia - EPA (503-326-5873)
Columbia River Tributary: Snake River	Total Dissolved Gas	Implementation	Andrew Kolosseus 360-407-7543

Last updated December 2010