Chestnut Hill Reservoir Historic District is located between Beacon Street and Commonwealth Avenue in Boston, Massachusetts, just east of the Boston College Main Campus Historic District and the Boston-Newton city line. On February 18, 1990, it was added to the National Register of Historic Places. The district encompasses the reservoir and all of the structures related to its use, including the terminating gatehouse of the Sudbury Aqueduct, which feeds the reservoir, and the former pumphouses that distributed its water.