Located in northwestern Whatcom County, the Birch Bay watershed covers 27 square miles (17,280 acres) of low elevation area draining into Birch Bay and Georgia Strait. The watershed is home to a variety of residential neighborhoods, vacation homes and RV parks, small farms, parks and open space, and industrial sites. Birch Bay is shallow with expansive tide flats that provide habitat to a variety of marine life and is a popular shellfish harvesting destination.

Click on the map below to view district boundaries.