CHB is a great local environmental group with a charter to look after Commencement Bay, protecting it from pollution, etc., as well as maintaining and restoring shoreline habitat. They've been pretty successful in some of their habitat projects in the tideflats areas thanks to a large roster of volunteers willing to help out. They have a neat network of people who keep an eye out for possible polluters in the bay, including people in kayaks, and a paid BayKeeper checking things out from a power boat. I've done some volunteering here, and have been very impressed. Neat group.