Hydropower - Statistics & Facts

Hydropower is harnessed from the kinetic energy derived from moving water. This power is often found in streams and rivers that flow from hills and mountains. Hundreds of years ago, this energy was used to power sawmills and domestic lifts and many other domestic devices. In 1879, the first hydroelectric power plant was built at Niagara Falls and soon after, began its operation to power a small city in Wisconsin. Generally, a hydropower plants has three parts: a plant where electricity is produced, a dam to control water flow, and a reservoir to store water.

Hydropower generates over 16 percent of the world’s electricity and the consumption of energy generated by hydropower continues to increase. Predictably, hydroelectricity is most commonly used in countries with plenty of running water. In fact, hydropower is considered one of the cheapest sources of energy; after a facility’s construction and installation, harnessing the power of flowing water is essentially free. The speed of running water can also be controlled through turbines to produce electricity on demand.

Although hydropower is considered a renewable energy source, large hydropower dams can still be responsible for environmental problems such as disrupting and damaging aquatic ecosystems. Most new hydropower projects worldwide must undergo an Environmental and Social Impact Assessment. An alternative to large dam facilities is small hydropower technologies, which garnered about 3.4 billion U.S. dollars in funding in 2017. Many hydropower plants can also be used for other purposes, such as agricultural irrigation.

Interesting statistics

In the following 4 chapters, you will quickly find the 21 most important statistics relating to "Hydropower".

Hydropower industry

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Important key figures

The most important key figures provide you with a compact summary of the topic of "Hydropower" and take you straight to the corresponding statistics.

Water resources

U.S. hydropower industry


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