the Environmental Protection Agency established by this section. (8) Puget Sound The term Puget Sound means the estuary that is an arm of the Pacific Ocean, extends inland, and meets 19 different river basins. (9) Puget Sound region The term Puget Sound region includes all of the water that falls on the Olympic and Cascade Mountains and flows to meet Puget Sound’s marine waters. The Puget Sound region covers the land and waters in the northwest corner of the State of Washington from the Canadian border to the north to the Pacific Ocean on the west, including Hood Canal and the Strait of Juan de Fuca. (10) Puget Sound Action Agenda