Massachusetts

Ashburnham Municipal Light Belmont Municipal Light Berkshire Company (WMECO) Braintree Electric Light Department Boylston Electric Light Department Chester Municipal Electric Light Chicopee Electric Light Department Concord Municipal Light Plant Danvers Electric Department Eversource Energy (NSTAR, Western Massachusetts Electric) Georgetown Electric Department Gosnold Municipal Electric Plant Groton Electric Department Groveland Light Department Hingham Municipal Light Department Holden Municipal Light Department Holyoke Gas and Electric Hudson Light and Water Department Hull Electric Light Department Ipswich Electric Light Department Littleton Electric Light and Water Department Marblehead Municipal Light Department Mansfield Municipal Light Department Merrimac Light and Water Department Middleboro Municipal Gas and Electric Department Middleton Municipal Light Department National Grid (Massachusetts Electric, Nantucket Electric) North Attleboro Electric Department Northeast Utilities Norwood Electric Light Department NSTAR Paxton Municipal Light Department Peabody Municipal Light Plant Princeton Electric Light Department Reading Municipal Light Department Rowley Electric Light Department Russell Municipal Light Department Shrewsbury Electric Light Department South Hadley Electric Light Department Sterling Electric Light Department Taunton Municipal Light Plant Templeton Municipal Light Company Unitil Corporation Wakefield Municipal Gas and Light Department Wellesley Municipal Light Plant West Boylston Municipal Lighting Westfield Gas and Electric Department PTI Electric Department Direct Energy

Detroit Water and Sewerage Department Grand Rapids Water System Great Lakes Water Authority Holland Board of Public Works Lansing Board of Water and Light Michigan American Water Saginaw-Midland Municipal Water Supply Corporation