Marine toxic contaminants

Graphic showing how PCBs and other toxins are magnified as they progress up the food chain
Photo by WDFW

The Washington Department of Fish and Wildlife's Toxics Biological Observation System (TBiOS) team monitors the geographic extent and magnitude of toxic contaminants in marine and salmonid species in Puget Sound and Washington's Pacific coast. We evaluate and track complex patterns of pollution in these ecosystems using a number of indicator species within the food web, representing a wide range of habitat and movement patterns. Results from these studies help guide efforts to protect fish and shellfish health, ensure seafood safety, and promote ecosystem recovery.