Whole effluent toxicity testing ensures wastewater does not harm aquatic life.
We collect data on the health of environmental systems that support plant and animal life.
Our blog posts tell how Ecology works to protect Washington’s environment and quality of life. We strive to promote the wise management of our air, land and water for the benefit of current and future generations.
Freshwater Aquatic Plants Manual
An illustrated guide to some of the more common freshwater aquatic plants found in Washington, such as hydrilla, milfoil, pondweeds, bladderworts, and more.
Models & spreadsheets
Computer models predict changes and spreadsheets calculate. We offer these tools to the public.
Eyes over Puget Sound
We use aerial photos and data from our monitoring stations and ferries to report on Puget Sound.
Ecology's authoritative GIS data layers are available for download.