SEATTLE, WA - Starting May 10, boaters won't be able to dump in Puget Sound or Lake Washington.

On Monday, state Department of Ecology Director Maia Bellon signed a new regulation banning the discharge of sewage in local waters. The "Puget Sound No Discharge Zone" includes the sound, the lake, and all waterways that connect them.

The new regulation applies to treated and untreated sewage. Rules covering graywater discharge remain in place. Under previous rules, boaters could dump untreated sewage 3 miles from shore, and treated sewage could be dumped anywhere.