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Prices here are state averages across all utilities and rate plans, from the U.S. Energy Information Administration — not the rate on any one bill. Generation-mix figures are reported annually, not real time.

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Hydro Power in Maine

Net generation and share of the state power mix, 2025 — U.S. Energy Information Administration.

Hydro generation (2025)
2,639 thousand MWh
Share of state power mix
17.79%
National rank (hydro output)
#16
U.S. average share
5.58%

Hydro share of Maine's power mix over time

2001: 13.52%2025: 17.79%

Year by year

YearHydro (thousand MWh)Share of state mix
20252,63917.79%
20242,85219.46%
20233,83230.62%
20223,06324%
20212,54123.29%
20203,15831.58%
20193,49933.36%
20183,26128.91%
20173,38930.08%
20163,00026.05%
20153,36128.62%
20143,62327.35%
20133,56025.38%
20123,73324.8%
20113,97924.91%
20103,81022.39%
20094,21225.76%
20084,45726.07%
20073,73823.18%
20064,27825.44%
20054,09121.71%
20043,43017.96%
20033,17316.72%
20022,76812.28%
20012,64513.52%

Source: U.S. Energy Information Administration, electric power operational data (net generation by state and energy source). "Share of state mix" is this fuel's net generation as a percentage of all in-state net generation.

Hydro Power in Maine | EnergyAtlasUSA