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Green Municipal Aggregation

  • How it Works

    How it Works

     
  • Participating Communities

    Participating Communities

     
  • Get Involved

    Get Involved

     

What Is GMA?

Massachusetts and Rhode Island state laws allow a city or town to choose the electricity supplier for residents and businesses within that municipality. This is called municipal aggregation or community choice aggregation. It allows for important energy decisions to be made at the local level rather than by an investor-owned utility or by a for-profit competitive electricity supplier. 

Green Municipal Aggregation, or GMA, is a model we devised with energy broker Good Energy that adds more Class I or "new" renewable energy to residents' electricity at a competitive price. When a community decides to enact GMA, it goes out to bid for an electricity supplier and secures a long-term price and a cleaner electricity supply. That supplier replaces the utility's Basic Service, offers a more stable price (usually cheaper in the long run, too), and adds more renewable energy than required by state law.

Participating Communities

Here is a list of participating communities:

Name Renewable electricity (added by default) Supplier (what you'll see on your electric bill) Website
Arlington 11% Direct Energy arlingtoncca.com
Bedford 10% Dynegy bedfordcca.com
Brookline 30% Direct Energy brooklinegreen.com
Dedham 10% Constellation New Energy masscea.com/dedham
Fairhaven 10% Constellation New Energy masscea.com/fairhaven
Gloucester 10% Constellation New Energy gloucester-cea.com
Hamilton 5% Constellation New Energy hamiltoncca.com
Medford 5% Dynegy medfordcea.com
Melrose 5% NextEra melrose-cea.com
Millis 5% Constellation New Energy n/a
Milton 10% NextEra miltoncea.com
Rockland 5% Dynegy rockland-cea.com
Somerville 10% Direct Energy somervillecce.com
Stoneham 5% Constellation New Energy stonehamcea.com
Waltham 10% Direct Energy waltham-cea.com
Westford 10% Constellation New Energy masscea.com/westford/
Winchester 10% Dynegy winpowerma.com
       

Get involved

If you’re interested in learning more about GMA or want to find out how your community can get started, contact Mikaela@greenenergyconsumers.org