State law allows municipalities to own, maintain and operate a municipal light plant (“MLP”) in order to provide electric and/or gas services to its citizens.  Forty-one communities have established MLPs that serve all or part of 50 municipalities for electric service.  Generally, MLPs are run by municipal light boards or commissions in a municipality, or by the mayor/board of selectmen.  The Department’s role in regulating MLPs is limited as MLPs’ rates are set by municipal officials.  The MLP provides both distribution and supply service to its customers. Here is a map of the Massachusetts MLPs pdf format of Map of Electric Company Service Territories
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Towns served by MLPs:

Ashburnham

Belmont

Berkley (through Taunton Municipal Lighting Plant)

Boxborough (through Littleton Electric Light & Water Department)

Boylston

Braintree

Chester

Chicopee

Concord

Danvers

Dighton (northern section of town through Taunton Municipal Lighting Plant)

Georgetown

Gosnold

Groton

Groveland

Hingham

Holden

Holyoke

Hudson

Hull

Ipswich

Lakeville (electric service through Middleboro Gas and Electric Department)

Littleton

Lynnfield (Reading Municipal Light Plant/Peabody Municipal Light Plant)

Mansfield

Marblehead

Merrimac

Middleborough

Middleton

North Attleborough

North Reading (through Reading Municipal Light Plant)

Norwood

Paxton

Peabody

Princeton

Raynham (through Taunton Municipal Lighting Plant)

Reading

Rowley

Russell (northern part of town)

Shrewsbury

South Hadley

Sterling

Stow (through Hudson Light and Power Department)

Taunton

Templeton

Wakefield

Wellesley

West Boylston

Westfield

Wilmington (through Reading Municipal Light Plant)

 

MLPs

Ashburnham Municipal Light Plant
Belmont Municipal Light Department
Boylston Municipal Light Department>
Braintree Electric Light Department
Chester Municipal Electric Light Department
Chicopee Municipal Lighting Plant
Concord Municipal Light Plant
Danvers Electric Division
Georgetown Municipal Light Department

Gosnold Electric Light Company
Groton Electric Light Department
Groveland Municipal Light Department
Hingham Municipal Light Plant
Holden Municipal Light Department
Holyoke Gas & Electric Department
Hudson Light and Power Department
Hull Municipal Lighting Plant
Ipswich Municipal Light Department
Littleton Electric Light & Water Department
Mansfield Municipal Electric Department
Marblehead Municipal Light Department
Merrimac Municipal Light Department
Middleborough Gas & Electric Department
Middleton Municipal Light Department
North Attleborough Electric Department
Norwood Municipal Light Department
Paxton Municipal Light Department
Peabody Municipal Light Plant
Princeton Municipal Light Department
Reading Municipal Light Department
Rowley Municipal Lighting Plant
Russell Municipal Lighting Company
Shrewsbury's Electric Light Plant
South Hadley Electric Light Department
Sterling Municipal Light Department
Taunton Municipal Lighting Plant
Templeton Municipal Lighting Plant
Wakefield Municipal Light Department
Wellesley Municipal Light Plant
West Boylston Municipal Lighting Plant
Westfield Gas and Electric Light Department