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The following table lists overview information for water quality improvement projects (also known as total maximum daily loads, or TMDLs) for this water resource inventory area (WRIA).
For more information about the Columbia River system please see www.ecy.wa.gov/apps/watersheds/wriapages/index.html (Environmental Assessment Program website). Please take note of which WRIAs are in the system (see map at the top of this page).
To get additional information about the waterbodies in the Columbia River system please use the Water Quality Assessment Simple Query Tool.
| Waterbody Name (For more information about the TMDL project use the waterbody links, where available.) |
Pollutant(s) |
Status |
TMDL Lead(s)/Contacts |
| Columbia River | Dioxin | TMDL Issued by U.S. EPA |
Andrew Kolosseus 360-407-7543 |
|
Segment:
|
Total Dissolved Gas | Approved |
Andrew Kolosseus 360-407-7543 |
|
Segment: Columbia River, Middle |
Total Dissolved Gas | Approved |
Andrew Kolosseus 360-407-7543 |
| Columbia and Snake River Mainstem (EPA Website) | Temperature | "Delayed to allow necessary discussions and information exchange." (per EPA Website) |
Marylou Soscia - EPA (503-326-5873) |
|
Columbia
River Tributary:
|
Total Dissolved Gas | Implementation |
Andrew Kolosseus 360-407-7543 |
* The Department of Ecology and other state resource agencies frequently use a system of 62 "Water Resource Inventory Areas" or "WRIAs" to refer to the state's major watershed basins.
Contact us for more information
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