Explore the largest hydro power plants in Connecticut and see all the utility-scale hydro projects in Connecticut on a map.
Last updated: May 2026
On this page, you can explore our real-time database of hydro power plants in Connecticut. Each month, we track hydro projects and update our list of the largest hydro power plants in Connecticut.
As of May 2026, there are 15 utility-scale hydro power plants in Connecticut, according to Cleanview's project tracker. Their total operating capacity is 149 MW.
Total Hydro Power Plants
15
Total Capacity
149 MW
Built in 2025
0
Map of hydro power plants in Connecticut. Marker size reflects capacity — only facilities with reported capacity data are shown.
37 MW
Year Operational: January 1955
Location: New Haven, Connecticut
31 MW
Year Operational: January 1929
Location: Litchfield, Connecticut
31 MW
Year Operational: January 1936
Location: Fairfield, Connecticut
9 MW
Year Operational: January 1914
Location: Litchfield, Connecticut
9 MW
Year Operational: January 1989
Location: Fairfield, Connecticut
8 MW
Year Operational: December 1925
Location: Hartford, Connecticut
7 MW
Year Operational: January 1903
Location: Litchfield, Connecticut
3 MW
Year Operational: April 1986
Location: Hartford, Connecticut
3 MW
Year Operational: May 1984
Location: New London, Connecticut
2 MW
Year Operational: January 1995
Location: New Haven, Connecticut
3 MW
Year Operational: August 1990
Location: Windham, Connecticut
9 MW
Year Operational: January 1989
Location: Fairfield, Connecticut
3 MW
Year Operational: April 1986
Location: Hartford, Connecticut
3 MW
Year Operational: May 1984
Location: New London, Connecticut
1 MW
Year Operational: May 1967
Location: New London, Connecticut
37 MW
Year Operational: January 1955
Location: New Haven, Connecticut
2 MW
Year Operational: January 1949
Location: New London, Connecticut
2 MW
Year Operational: January 1949
Location: New London, Connecticut
Cleanview