Before the enactment of deregulation legislation, one utility (or wires) company took care of selling, distributing and transmitting energy to residents. After deregulation was enacted, the wires company in Buffalo continued to transmit and distribute energy, while other providers handled energy sales and payments for residents. National Grid (Niagara Mohawk) is the primary utility service zone for Buffalo. This company, which serves 3.4 million Americans in five states, is not the only option for consumers in this area, though. Choose Energy partners with the most affordable and efficient energy providers in Buffalo, such as Constellation, and Public Power. The companies provides several choices to help customers find better prices and to encourage competition among suppliers.