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

30%

NextEra

arlingtoncca.com

Bedford

20%

NextEra

bedfordcca.com

Brookline

36-45%

NextEra

brooklinegreen.com

Cohasset

10%

Direct Energy

electricity.cohassetma.org

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

Marshfield

10%

Direct Energy

marshfield-ma.gov

Medford

5%

NextEra

medfordcea.com

Melrose

10%

NextEra

mcp.cityofmelrose.org

Millis

5%

Constellation New Energy

n/a

Milton

10%

NextEra

miltoncea.com

Rockland

10%

Dynegy

rockland-cea.com

Scituate

10%

Direct Energy

electricity.scituatema.gov

Somerville

20%

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

Westwood

10%

Direct Energy

townhall.westwood.ma.us

Winchester

20%

NextEra

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