Persistent contaminants

Persistent contaminants, also known as persistent organic pollutants (POPs), are toxic chemicals that adversely affect human health and the environment around the world. They persist for long periods of time in the environment and can accumulate and pass from one species to the next through the food chain. 

Source: Environmental Protection Agency

Lower Duwamish Waterway dredging on Superfund site. Photo: Gary Dean Austin (CC BY-SA 2.0) https://www.flickr.com/photos/49648789@N08/17069420399/

OVERVIEW

Persistent contaminants in Puget Sound: Overcoming a toxic legacy

The Lower Duwamish Waterway in Puget Sound was designated a Superfund cleanup site in 2001. Its legacy of contamination predates World War II and the waterway continues to pollute Puget Sound through stormwater runoff.

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