Related Information

Following are links to information related to water quality improvement. This is not intended to be a comprehensive list.


Watershed Information and Planning
Watershed approach to water quality, watershed planning, links to on-line watershed resources, and link to related websites. Development and implementation of watershed plans, watershed grant information, water resources information.

Watershed Conditions

Rules and policy

TMDL Dispute Resolution Policy (PDF)
Water Quality Program policy on process to resolve TMDL project report issues

Clean Water Act (Cornell University Website)

Washington State Water Quality Assessment

Washington's Water Quality Assessments (303[d])
Identifies the locations of impaired waterbodies in Washington and tells which water quality standards each waterbody exceeds, and by how much.

Water Quality Assessment Simple Query Tool
Use this tool to browse for information on the current Water Quality Assessment.

Data Quality and Monitoring

Water Quality Data Quality Assurance
Information on water quality data assurance - what it is, why it is important, and what the State of Washington is doing to support quality assurance of water quality data.

Effectiveness Monitoring of Water Quality Improvement Projects in Washington State Fresh Waters
Information on the purpose and process of gathering and analyzing water quality information, after a water cleanup plan (total maximum daily load, or TMDL) or other water quality improvement project is put into place, to see if the efforts actually resulted in cleaner water.


U.S. Government Accountability Office (GAO)

Clean Water Act: Changes Needed if Key EPA Program is to Help Fulfill the Nation's Water Quality Goals

Unless otherwise specified, the following documents are Ecology publications.

Water Quality Improvement Projects also known as Total Maximum Daily Loads (Water Quality Improvement): What should I know? What does it mean to me?

Characterizing Stormwater for Total Maximum Daily Load Studies: A Review of Current Approaches
A review of stormwater study methods, applicable models, data needs, sampling approaches, and other factors to be considered by project managers when designing stormwater studies.

Water Quality Program Guidance: Implementing Washington State Temperature Standards through Water Quality Improvement and NPDES Permits
Guidance to aid in implementing the state's temperature standards through Water Quality Improvement and NPDES permits.

Relationship between Land Use and Nitrate Concentrations In Washington State Department of Ecology Monitored Watersheds: Technical Memorandum
Provides a method to estimate the level of nitrate export to surface and groundwater associated with a variety of sources, and a means to assess risk based on the type and intensity of a variety of land-use activities to adversely impact surface and ground water throughout Washington State.

Focus On Clean Water: Getting to Clean Water

EPA websites

TMDL Web site - EPA Region 10

Guidance for current assessment, listing and reporting requirements pursuant to sections 303(d) and 305(b) of the Clean Water Act (EPA Document).
TMDL -01-0, signed July 21, 2003.

US EPA Section 319 Success Stories (EPA website)
Go to "Featured Stories" and click on Washington State link.

EPA Survey Finds More Than Half of the Nation’s River and Stream Miles in Poor Condition (March 26, 2013)

Other related websites and information

Ecology's Surface Water Quality Standards site

Water Quality Guide: Recommended Pollution Control Practices for Homeowners and Small Farm Operators


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Last updated January 2017