The Mystic Water Works, also called the Mystic Pumping Station, is a historic water works at Alewife Brook Parkway and Capen Street in Somerville, Massachusetts. Built in 1862–65 by the city of Charlestown (since annexed to Boston), it is a significant example of a mid-19th century waterworks facility. The building has been listed twice on the National Register of Historic Places. The first, in 1989, is part of the city of Somerville's listings, and was made under the name "Mystic Water Works". The second is part of an umbrella listing covering the entire historic water works system of Greater Boston, and was made in 1990, listed as the "Mystic Pumping Station".