Question: The Sudbury Reservoir, is an emergency backup Boston metropolitan water reservoir located in Framingham, a town in the Commonwealth of Massachusetts, in which country?

<P0-S0> Framingham is a town in the Commonwealth of Massachusetts in the United States. <P0-S1>  Incorporated in 1700, it is located within Middlesex County and the MetroWest subregion of the Greater Boston metropolitan area. <P0-S2>  The town proper covers 25 mi2 with an estimated population of 68,318 in 2010, making it the 14th most populous municipality in Massachusetts. <P0-S3>  Residents voted in favor of adopting a charter to transition from a representative town meeting system to a mayor–council government in April 2017, and will transition to city status on January 1, 2018. <SEP> <P1-S0> The Chestnut Hill Reservoir Historic District is a historic district encompassing the Chestnut Hill Reservoir and the surrounding water works facilities which were historically used to provide fresh water to Boston, Massachusetts, and surrounding towns. <P1-S1>  The district is nearly coextensive with the Chestnut Hill Reservation, a state park managed by the Massachusetts Department of Conservation and Recreation (DCR); those elements of the water works that are still required as an emergency backup are managed by the Massachusetts Water Resources Authority (MWRA). <P1-S2>  The reservoir is located between Beacon Street and Commonwealth Avenue in Boston, just east of the Boston College Main Campus Historic District and the Boston-Newton city line. <P1-S3>  Most of the water works facilities are also located in Boston; the terminal house of the Sudbury Aqueduct, which is part of this district, is located just over the line in Newton. <SEP> <P2-S0> The Framingham Reservoir No. 1 Dam and Gatehouse are a historic water works facility in Framingham, Massachusetts. <P2-S1>  They are located at the end of Framingham Reservoir No. 1, which is also known as the Stearns Reservoir, off Winter Street and north of Long Avenue. <P2-S2>  They were constructed 1876-78 as part of an expansion of the water supply of the city of Boston and were designed by its first city architect George A. Clough. <P2-S3>  The historical purpose of the reservoir, which was located at the confluence of two branches of the Sudbury River, was primarily to control the river's water level, and secondarily to provide reserve supply capacity. <P2-S4>  The reservoir's reserve capacity was generally used only as a backup supply as the reservoir's muddy bottom made it a less desirable source than reservoir 3 upstream. <P2-S5>  However the reservoir no. 1 system was nonetheless important due to its role in controlling the flow of the river downstream and due to the gatehouse which controlled the water flows for all the Framingham reservoirs into the Sudbury Aqueduct. <P2-S6>  Reservoir No. 1 is no longer maintained as a reserve water source, although it is still owned by the Massachusetts Water Resources Authority, successor to the Boston Water Board which oversaw its construction. <P2-S7>  MWRA retains ownership as the gatehouse contains the connection between Reservoir No. 3 and the Sudbury Aqueudct which remain part of the emergency water systems. <SEP> <P3-S0> The Sudbury Reservoir (2.02 square miles) is an emergency backup Boston metropolitan water reservoir located in Framingham, Marlborough, Southborough, and Westborough, Massachusetts. <P3-S1>  Nearly 5000 acre in the Sudbury Reservoir watershed are administered by the Massachusetts Department of Conservation and Recreation as a limited-access public recreation area.