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Water Quality Improvement Projects (TMDLs)

Lewis County projects

The following table lists overview information for water quality improvement projects (including 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 water bodies in Lewis County please use the Water Quality Assessment Query Tool.


WRIAs in Lewis County

Waterbody Name Pollutant(s) Status TMDL Lead(s)
Chehalis River Basin Chehalis River
  • Ammonia-N
  • BOD (5-day)
  • Dissolved Oxygen
Upper Chehalis:
  • Fecal Coliform
  • Temperature


  • Black River
  • Lincoln Creek
  • Scatter Creek
  • Dillenbaugh Creek
  • Skookumchuck Cr
  • Salzer Creek
  • Newaukum River

EPA approved

Has an implementation plan

Brett Raunig
Nisqually Watershed


  • McAllister Creek
  • Ohop Creek
  • Red Salmon Creek
  • Lynch Creek
  • Wash Creek
  • Unnamed Tributary to West Red Salmon Creek
  • Little McAllister Creek
  • Medicine Creek mouth
Fecal Coliform
Dissolved Oxygen
EPA approved

Has an implementation plan

Donovan Gray


Last updated October 2016