The Weston Reservoir is part of the greater Boston water supply maintained by the Massachusetts Water Resources Authority.

It is located in central Weston, with its principal public access point on Ash Street.

This system has since the mid-20th century been upgraded to use completely underground facilities downstream of the Wachusett Reservoir.

Walkers extensively use the area around the Weston Reservoir.

This reservoir is maintained by the MWRA along with other open distribution reservoirs (Sudbury, Foss, Brackett, Stearns, Norumbega, Waban, Spot Pond, Chestnut Hill and Middlesex Fells) as a backup distribution system.