IID's Energy Department provides electric power to more than 145,000 customers in the Imperial Valley and parts of Riverside and San Diego counties. Service to residents of the Imperial Valley and Coachella valleys includes the Imperial Valley cities of El Centro, Calexico, Holtville, Brawley and Coachella Valley cities including Mecca, Thermal, La Quinta, Coachella and Indio, Bermuda Dunes, Thousand Palms, Indio Hills and Sky Valley. As the third largest public power utility in California, IID controls more than 1,100 megawatts of power derived from a diverse resource portfolio that includes its own generation, and long- and short-term power purchases.