Washington State Department of Ecology

Ecology home > Water Quality > Water Quality Assessments & TMDLs > TMDLs

Hangman Creek photo. Courtesy of Elaine Snouwaert, Dept. of Ecology.

Water Quality Improvement Projects (TMDLs)

The Total Maximum Daily Load (TMDL) or Water Quality Improvement Project process was established by Section 303(d) of the Clean Water Act (CWA) to establish limits on pollutants that can be discharged to the waterbody and still allow state standards to be met.

This site provides information on current and historical Water Quality Improvement Projects.

Overview of the TMDL process

Individual TMDL Project Information

Potential Funding Sources for Water Quality Improvement Projects

TMDL Contacts

Priority Lists for TMDL Project Development (by fiscal year)

Related Information

Last updated May 2010

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