Eversource Energy is a utility holding company, which is engaged in the energy delivery business through its utility subsidiaries. Its segments include Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution. The Electric Distribution segment is engaged in the distribution of electricity to retail customers in Connecticut, Massachusetts and New Hampshire, respectively, and the solar power facilities of NSTAR Electric Company. The Electric Transmission segment owns and maintains transmission facilities that are part of an interstate power transmission grid over which electricity is transmitted throughout New England. The Natural Gas Distribution distributes natural gas to his customers in central and eastern Massachusetts. The Water Distribution segment provides water services to over 248,000 residential, commercial, industrial, municipal and fire protection and other customers, in 73 towns and cities in Connecticut, Massachusetts and New Hampshire.