The Tehachapi Wind Farm, with around 5,000 wind turbines, is the second largest collection of wind generators in the world (the largest is at the Altamont pass, near Livermore and the San Francisco Bay area), but is now the largest wind power array in the world in output. The turbines are operated by a dozen private companies, and collectively produce about 800 million kilowatt-hours of electricity, enough to meet the residential needs of 350,000 people every year. With over 15,000 turbines in the state (7,000 at Altamont and 3,000 at San Gorgonio Pass, near Palm Springs), wind power in California makes up about 1% of California's electricity.