Westborough / Massachusetts / United States
Columbia Gas of Massachusetts is an energy services company serving nearly 300,000 natural gas customers in Massachusetts. The company is a wholly-owned subsidiary of NiSource Inc., based in Merrillville, Ind. NiSource Inc. is a Fortune 500 holding company with headquarters in Merrillville, Ind., whose core operating companies engage in natural gas transmission, storage and distribution, as well as electric generation, transmission and distribution. NiSource operating companies deliver energy to 3.7 million customers located within the high-demand energy corridor stretching from the Gulf Coast through the Midwest to New England.
