OverviewHydroelectric power generationLegal renewables requirementSignificance at national levelSolar power generationGeothermal power generationBiomass power generationWind power generation
Hydroelectric power is power created from the energy of running water. This water is usually stored and controlled by dams. Its productivity changes in accordance to how much rainfall is produced annually. In 2018, California ranked second in the United States for conventional hydroelectric generation, however this is highly variable depending on droughts. For instance it obtained 21% of its electricity through hydroelectric power sources in 2017. This was higher tha