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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 county. Please use links (where available) for more information on a project.
To get additional information about the waterbodies in Cowlitz County please use the Water Quality Assessment Simple Query Tool.
| Waterbody Name | Pollutant(s) |
Status |
TMDL Lead(s)/Contacts |
| Chehalis River |
Ammonia-N BOD (5-day) |
Approved |
Dave Rountry 360-407-6276 |
| Chehalis River (re-submit) | Dissolved Oxygen | Approved |
Dave Rountry 360-407-6276 |
| Chehalis River, Upper | Fecal Coliform | Approved |
Dave Rountry 360-407-6276 |
|
Chehalis River,
Upper tributaries:
|
Temperature | Approved |
Dave Rountry 360-407-6276 |
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