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Power in Massachusetts

With fossil power plants located in Massachusetts, Exelon provides jobs and reliable, affordable power to nearby communities. We are dedicated to minimizing our impact on the environment and improving the communities we serve.

Economic Development

Exelon operates power plants at four locations in Massachusetts. These power plants are fueled by oil and natural gas and generate electricity during periods of peak or intermediate demand. In total, the Exelon fleet in Massachusetts paid $32 million in taxes in 2012. 

Constellation provides commercial, industrial, public sector and government agencies, municipalities and utilities with a comprehensive array of products and services to meet electricity, and sustainability needs. Constellation also provides competitive pricing for electricity, as well as renewable energy options for residential customers.


Environmental Commitment

One of the ways Exelon accomplished its 2020 GHG emissions reduction goal was by retiring a less efficient and higher-emitting fossil fuel power plant in Massachusetts. 

Units 8 and 9 at Mystic Generating Station are combined cycle gas turbines (CCGT) and are highly-efficient units that provide nearly 1,500 megawatts of clean generation fueled by natural gas. 

Constellation also works with its retail and wholesale customers to reduce energy consumption and offers renewable and sustainable options including:

  • Solar
  • Energy Efficiency
  • Renewable Energy certificates
  • Load response solutions

Community Involvement

Exelon is committed to strengthening the community in which we live and serve. 

Corporate Offices


Sales Office
Boott Mills South
116 John Street
Lowell, MA 01852-1124

Sales Office
116 Huntington #700
Boston, MA 02116

Power Plants

Framingham Generating Station

Framingham Generating Station

Framingham Generating Station is a 3-unit gas power plant located in Framingham, Massachusetts. The units at Framingham are used to provide much needed power and voltage support during peak energy periods.

91 Leland Street
Framingham, Massachusetts 1760
Mystic Generating Station

Mystic Generating Station

Mystic Generating Station is an eight unit, 2,002 MW natural gas and oil power plant located in Charlestown, Massachusetts.

173 Alford Street
Charlestown, Massachusetts 02129
New Boston Generating Station

New Boston Generating Station

New Boston Generating Station is operated by Exelon Power, a business unit of Exelon Generation, as part of the Peaking Division.  It is a 1-unit oil power plant located in Boston, Massachusetts.

776 Summer Street
South Boston, Massachusetts 2127
West Medway Generating Station

West Medway Generating Station

West Medway Generating Station is a 3-unit, 117 MW oil power plant located in West Medway, Massachusetts. West Medway’s Rolls Royce Avon engines were the first of 12 dual-fuel engines installed in the world.

9 Summer Street
West Medway, Massachusetts 2053