The world's largest geothermal plant

The Geysers, California, USA

The first geothermal power plant built at The Geysers in northern California dates back to 1921. Back then, it had a generation capacity of 250 kW. In the years preceding 1989, new capacity was added, finally reaching an installed capacity of 2043 MW. Since then electrical generation has declined and then levelled off. The Geysers still generates more electricity than any other geothermal field in the world. Current active generation capacity is close to 1000 MW.