Final 2004 Submittal

The 2004 list is available for informational and reference use only.

Use the most recent 303(d) list to be approved by EPA for the purposes of writing discharge permits, watershed characterization, financial assistance funding, TMDL prioritization, and TMDL implementation.


The Department of Ecology completed Washington State’s Water Quality Assessment for 2002/2004. Ecology submitted the Water Quality Assessment to EPA on June 2, 2005, as an “integrated report” to meet the Clean Water Act requirements of sections 305(b) and 303(d). EPA approved Category 5 of the 2004 Water Quality Assessment (PDF) on November 4, 2005. Category 5 represents the state’s 303(d) list of impaired waters.


Ecology worked with EPA to correct errors in the candidate submittal. As a result, several listings moved between categories. Please see our 2004 Water Quality Assessment Errata Table (PDF) to review these changes.

For related information on the water quality assessment, click on one of the following links:

Tools and other background information:

  1. Information on the 2004 Water Quality Assessment Process
  2. Public Process for the 2004 Water Quality Assessment

By Category:

  1. 2004 Water Quality Listings by Category
  2. 2004 Contaminated Sediment Listings by Category



If you have questions or need specific information on the 2002/2004 assessment, please contact:

Patrick Lizon
Water Quality Program
WA Department of Ecology
P.O. Box 47600
Olympia, WA 98504-7600



Last updated May 2015