North Chelmsford Water is responsible for providing water to one third of the entire town. Most Chelmford residents receive their water from the town, which is divided into three water districts: North Chelmsford, Chelmsford Center, and East Chelmsford. The town has fourteen wells that draw water from the Concord River Basin and the Merrimack River Basin. It is pumped from the ground, treated, and sent to homes and schools.