Puget Sound Starts Here‘s music video says it all:

Creating a poop-free Puget Sound is more important than you might think. According to King County, there are more than 200 tons of pet waste deposited in the Puget Sound region every day, and water runoff flushes some of it into streams, rivers and Puget Sound. Dog poop contains things like E. coli, Giardia and Roundworms – nasty stuff that we don’t want in Puget Sound. The very best thing you can do when walking your dog outside is to bring plastic bags, pick up the poop, and dispose of it in a trash can. Do not contaminate your compost with pet waste. This is one of those rare cases where throwing something away is one of the best options.  Alternatively, you can pick it up and flush it down your toilet.