Research & Data

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.

We analyze freshwater fish for various toxic chemicals.

Computer models mathematically represent part of the environment to predict potential changes.

We use models to predict water quality changes to help find strategies to address pollution.

We conduct water and sediment long-term monitoring to identify ecosystem changes.

Computer models predict changes and spreadsheets calculate. We offer these tools to the public.

We use aerial photos and data from our monitoring stations and ferries to report on Puget Sound.

Does salmon habitat restoration work? Our Intensively Monitored Watersheds program aims to find out.

The Freshwater Quality Index can help you learn about river and stream health.

We evaluate the health of rivers and streams by studying multiple aquatic communities.

We evaluate whether forest practices rules protect fish, wildlife, and water quality.

Ecology's authoritative GIS data layers are available for download.

Access to discrete and time-series environmental data for air, water, soil, sediment, aquatic animals, and plants.

Learn about Ecology's scientific research and services.

Information on Ecology's public hearings, meetings, workshops, open houses, and open comment periods.

We offer scientific services to support environmental work and inquiry for projects funded through public dollars. We provide accurate, credible, and defensible analyses using the latest accredited methods.

Ecology has delegated federal and state authority to implement and enforce various environmental laws and rules. We accomplish this through our open and public rulemaking process.

This is the gateway to Ecology's many web-accessible databases and tools.

Look up information on facilities and sites of interest to the Department of Ecology.