UPDATE: Ecology's new website will be live on Monday morning! Our official web address will be https://ecology.wa.gov

Marine Water photo

Marine Water Quality Monitoring

Long-Term Nutrient Trends for Puget Sound and Coastal Bays

We monitor marine water in Puget Sound, Grays Harbor and Willapa Bay to determine long-term trends in nutrients, algal biomass and dissolved oxygen and a suite of additional variables to create environmental context. Get previous releases of trends here. Can't see the embedded pdf file? Download here.