Nashville Electric Service is one of the 12 largest public electric utilities in the nation, distributing energy to more than 370,000 customers in Middle Tennessee. The NES service area covers 700 square miles (1,800 km2), all of Nashville/Davidson County and portions of the six surrounding counties. The five member Board is appointed by the Mayor and confirmed by the Metro Council. Members serve five-year staggered terms without pay. The Board appoints a chief executive officer who has responsibility for day-to-day operations, including hiring of employees.