Comprised of the area of land where all water drains into the Norwalk River, the watershed spans 40,000 acres across seven towns - Norwalk, Wilton, Ridgefield, New Canaan, Redding, Weston, CT and Lewisboro, NY.

It provides public drinking water, handles three wastewater treatment plants, offers hiking trails and recreational fishing, and feeds some of Connecticut’s most important oyster beds at its mouth in Long Island Sound!