The Geysers Complex, located in the Mayacamas Mountains, 72 miles north of San Francisco, California, USA, is the largest geothermal field in the world. The complex, and its 22 geothermal power plants therein, has a combined installed capacity of 1,520 MW. The power generated from the Geysers helps meet the electricity needs for California's Sonoma, Mendocino, and Lake counties. A part of the power needs of Napa and Marin counties are also met by the Geysers Complex. This is especially important, as this area of California has large numbers of people and important industries, many of whom are very ecologically conscious.