The Midwest

In the Midwest, the Great Lakes are responsible for sourcing water to the population. In Boston, the city's drinking water comes from two source reservoirs in central and western Massachusetts. They are known as the Quabbin and Wachusetts Reservoirs.  

The Quabbin Reservoir is the largest inland body of water in Massachusetts and was built between 1930 and 1939. 

The Wachusetts Reservoir is the second largest body of water in Massachusetts.

The water system in Boston includes these two reservoirs, surface aqueducts, covered storage tanks and deep rock tunnels. This system is known as the Metropolitan Boston Water System.