Wekepeke is the name of an aquifer and brook in Sterling, Massachusetts, United States. The aquifer has a land surface area of 11.5 square miles. The aquifer is primarily located in the northern part of the town of Sterling, Massachusetts. 1,448 acres, or about 20% of the aquifer, is permanently protected land. An additional 18 acres has limited land protection. W…Wekepeke is the name of an aquifer and brook in Sterling, Massachusetts, United States. The aquifer has a land surface area of 11.5 square miles. The aquifer is primarily located in the northern part of the town of Sterling, Massachusetts. 1,448 acres, or about 20% of the aquifer, is permanently protected land. An additional 18 acres has limited land protection. Wekepeke Brook flows 5.1 miles from Heywood Reservoir at the northern boundary of Sterling with Leominster, southeast to the community of Pratt Junction in the northeast part of Sterling, then northeast into the town of Lancaster, where it ends at the North Nashua River. The brook and aquifer, via the Nashua River, are part of the Merrimack River basin. Reservoirs on the aquifer include Heywood Reservoir, Fitch Basin, Spring Basin, and Upper and Lower Lynde Basins. Lynde Basin has been classified as most threatened.