Stories about Getting to Clean Water: Understanding and Controlling Sea Lettuce in Dumas Bay

By Diane Dent, Water Quality Stories Lead, Water Quality Program



Map of Dumas Bay, King County, Washington.


Dumas Bay, near Federal Way in King County, is part of Puget Sound. Three streams drain into the urban 40-acre bay, which is part of the Puyallup-White watershed.

The problem

Residents living along Dumas Bay began to notice excessive amounts of macro algae, better known as sea