Marine water & sediment monitoring

We conduct long-term monitoring of water and sediment to identify ecosystem changes in Puget Sound, Grays Harbor, and Willapa Bay using a variety of instruments and sampling gear deployed from seaplanes, boats, and passenger ferries.

Estuaries such as Puget Sound have large natural variations in depth, water circulation, influences from the ocean, and seasonal conditions. All of these variables influence the quality of the water column and the sediment found at the bottom of the sea and the organisms living there.

To support healthy ecosystems in Washington, we collect high-quality environmental data about the water column and sediments. A long-term data record allows us to detect both long-term patterns and short-term changes to share with scientists and inform policymakers.

Use the following links to learn about water and sediment studies, current conditions, and to read about our assessment methods and related marine studies. For those looking for marine water-column data, they will be available online in spring of 2019. If you'd like to access before then, please contact Carol Maloy.