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%Good Energyacp.andoverma.gov
Arlington, MA76%Good Energyarlingtoncca.com
Barrington, RI5%NextErabarringtoncommunityelectricity.com
Bedford, MA76%Good Energybedfordcca.com
Belchertown, MA10%Good Energybelchertownenergychoice.com
Boxford, MA10%Good Energyboxfordelectricity.com
Brookline, MA76%Good Energybrooklinegreen.com
Central Falls, RI5%NextEracentralfallscommunityelectricity.com
Cohasset, MA10%Good Energyelectricity.cohassetma.org
Dedham, MA10%Good Energymasscea.com/dedham
Fairhaven, MA10%Good Energymasscea.com/fairhaven
Framingham, MA8%Peregrinemasspowerchoice.com/framingham
Gloucester, MA15%Good Energygloucester-cea.com
Hamilton, MA5%Good Energyhamiltoncca.com
Hanson, MA10%Good Energyhansoncommunitypower.com
Malden, MA10%Good Energymaldencommunityelectricity.com
Marshfield, MA10%Good Energymarshfield-ma.gov
Medfield, MA10%Good Energyelectricity.medfield.net
Medford, MA10%Good Energymedfordcea.com
Melrose, MA10%Good Energymcp.cityofmelrose.org
Milford, MA10%Good Energymilfordcommunityelectricity.com
Millis, MA5%Good Energyhttps://empower.millisma.gov/
Milton, MA10%Good Energymiltoncea.com
Narragansett, RI5%NextEranarragansettcommunitychoiceelectricity.com
Needham, MA15%Peregrineasspowerchoice.com/needham
Newport, RI5%NextEranewportcommunityelectricity.com
Portsmouth, RI5%NextEraelectricity.portsmouthri.com
Providence, RI5%NextEraelectricity.providenceri.gov
Quincy, MA10%Good Energyquincycea.com
Rockland, MA10%Good Energyrockland-cea.com
Scituate, MA10%Good Energyelectricity.scituatema.gov
Somerville, MA20%Direct Energysomervillecce.com
South Kingstown, RI5%NextEraelectricity.southkingstownri.com
Stockbridge, MA5%Colonialcolonialpowergroup.com/Stockbridge/
Stoneham, MA5%Good Energystonehamcea.com
Townsend, MA10%Good Energytownsendcommunityelectricity.com
Waltham, MA10%Good Energywaltham-cea.com
Westford, MA10%Good Energymasscea.com/westford
Westwood, MA10%Good Energytownhall.westwood.ma.us
Winchester, MA20%Good Energywinpowerma.com

Winthrop, MA

10%

Good Energy

winthropcommunityelectricity.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