Explore the largest hydro power plants in New Hampshire and see all the utility-scale hydro projects in New Hampshire on a map.
Last updated: May 2026
On this page, you can explore our real-time database of hydro power plants in New Hampshire. Each month, we track hydro projects and update our list of the largest hydro power plants in New Hampshire.
As of May 2026, there are 32 utility-scale hydro power plants in New Hampshire, according to Cleanview's project tracker. Their total operating capacity is 516 MW.
Total Hydro Power Plants
32
Total Capacity
516 MW
Built in 2025
0
Map of hydro power plants in New Hampshire. Marker size reflects capacity — only facilities with reported capacity data are shown.
195 MW
Year Operational: October 2023
Location: Grafton, New Hampshire
168 MW
Year Operational: September 1930
Location: Grafton, New Hampshire
30 MW
Year Operational: October 1980
Location: Coos, New Hampshire
16 MW
Year Operational: August 1924
Location: Hillsborough, New Hampshire
15 MW
Year Operational: August 1948
Location: Coos, New Hampshire
12 MW
Year Operational: December 1981
Location: Merrimack, New Hampshire
11 MW
Year Operational: December 1986
Location: Coos, New Hampshire
8 MW
Year Operational: August 1925
Location: Grafton, New Hampshire
6 MW
Year Operational: November 1983
Location: Merrimack, New Hampshire
195 MW
Year Operational: October 2023
Location: Grafton, New Hampshire
1 MW
Year Operational: May 1995
Location: Sullivan, New Hampshire
1 MW
Year Operational: January 1995
Location: Strafford, New Hampshire
5 MW
Year Operational: December 1990
Location: Grafton, New Hampshire
1 MW
Year Operational: December 1989
Location: Hillsborough, New Hampshire
2 MW
Year Operational: December 1988
Location: Grafton, New Hampshire
4 MW
Year Operational: December 1987
Location: Merrimack, New Hampshire
1 MW
Year Operational: December 1987
Location: Strafford, New Hampshire
11 MW
Year Operational: December 1986
Location: Coos, New Hampshire
Cleanview