Green Municipal Aggregation

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:

NameRenewable electricity (added by default)Supplier (what you'll see on your electric bill)Website
Amesbury, MA5%Colonialcolonialpowergroup.com/amesbury/
Andover, MA15%Dynegyacp.andoverma.gov
Barrington, RI5%NextErabarringtoncommunityelectricity.com
Bedford, MA76%Direct Energy Servicesbedfordcca.com
Belchertown, MA10%Dynegybelchertownenergychoice.com
Boxford, MA10%Dynegyboxfordelectricity.com
Brookline, MA76%Direct Energy Servicesbrooklinegreen.com
Central Falls, RI5%NextEracentralfallscommunityelectricity.com
Cohasset, MA10%Direct Energy Serviceselectricity.cohassetma.org
Dedham, MA10%Constellation NewEnergymasscea.com/dedham
Fairhaven, MA10%Constellation NewEnergymasscea.com/fairhaven
Gloucester, MA15%Direct Energy Servicesgloucester-cea.com
Hamilton, MA5%Dynegyhamiltoncca.com
Hanson, MA10%Direct Energy Serviceshansoncommunitypower.com
Malden, MA10%Dynegymaldencommunityelectricity.com
Marshfield, MA10%Direct Energy Servicesmarshfield-ma.gov
Medfield, MA10%Direct Energy Serviceselectricity.medfield.net
Medford, MA10%Direct Energy Servicesmedfordcea.com
Melrose, MA10%Direct Energy Servicesmcp.cityofmelrose.org
Milford, MA10%Direct Energy Servicesmilfordcommunityelectricity.com
Millis, MA5%Constellation NewEnergyhttps://empower.millisma.gov/
Milton, MA10%Direct Energy Servicesmiltoncea.com
Narragansett, RI5%NextEranarragansettcommunitychoiceelectricity.com
Newport, RI5%NextEranewportcommunityelectricity.com
Portsmouth, RI5%NextEraelectricity.portsmouthri.com
Providence, RI5%NextEraelectricity.providenceri.gov
Quincy, MA10%Dynegyquincycea.com
Rockland, MA10%Direct Energy Servicesrockland-cea.com
Scituate, MA10%Direct Energy Serviceselectricity.scituatema.gov
South Kingstown, RI5%NextEraelectricity.southkingstownri.com
Stoneham, MA5%Dynegystonehamcea.com
Townsend, MA10%Constellation NewEnergytownsendcommunityelectricity.com
Waltham, MA10%Dynegywaltham-cea.com
Westford, MA10%Constellation NewEnergymasscea.com/westford
Westwood, MA10%Direct Energy Servicestownhall.westwood.ma.us
Winchester, MA20%Direct Energy Serviceswinpowerma.com
Winthrop, MA10%Direct Energy Serviceswinthropcommunityelectricity.com

 

Green Municipal Aggregation map 2023

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