Hydropower generated 4,160 TWh worldwide in 2021, about 15% of all electricity produced globally. In 2022, global installed hydropower capacity reached 1,308 GW, including 421 GW in China. This article follows capacity and output together to show how regional water conditions and upgrades change the numbers.
Key Takeaways
- In 2022, global hydropower installed capacity reached 1,308 GW, accounting for 15.4% of total global electricity capacity
- Global Levelized Cost of Electricity (LCOE) for hydro $0.05-0.17/kWh in 2022
- Hydropower reservoirs store 23% of world's freshwater used by humans
- Asia holds 60% global hydro capacity
- Run-of-river hydro efficiency 90-95%
Hydropower remains a major renewable electricity source, generating steady power while supporting grid reliability.
Related reading
01 · Category
Capacity and Production30 stats
01
In 2022, global hydropower installed capacity reached 1,308 GW, accounting for 15.4% of total global electricity capacity
02
China led with 421 GW of hydropower capacity in 2022, representing 32% of global total
03
Hydropower generated 4,160 TWh worldwide in 2021, or 15% of global electricity
04
The Three Gorges Dam in China has an installed capacity of 22.5 GW, the world's largest
05
Brazil's Itaipu Dam produces 103.1 TWh annually on average, shared with Paraguay
06
In 2020, the US had 80.25 GW of hydropower capacity, generating 252 TWh
07
Europe's hydropower capacity was 152 GW in 2022, with Norway at 33.8 GW
08
India's hydropower capacity stood at 46.7 GW in 2023, targeting 70 GW by 2030
09
Canada generated 379 TWh from hydro in 2021, 60% of its electricity
10
Africa's hydropower capacity is 40 GW, but potential is 300 GW
11
Russia's hydropower capacity is 53 GW, producing 200 TWh yearly
12
Vietnam added 2.3 GW hydro capacity in 2022, total 21 GW
13
Turkey's hydropower generation reached 124 TWh in 2022 from 31 GW capacity
14
Japan's hydro capacity is 27 GW, generating 76 TWh in 2021
15
Australia's Snowy 2.0 project will add 2 GW pumped storage
16
Global pumped storage hydropower is 160 GW, 90% of storage capacity
17
Laos exports 80% of its 7 GW hydro production to Thailand, Vietnam, China
18
Ethiopia's Grand Ethiopian Renaissance Dam will have 5.15 GW capacity
19
Peru's hydropower is 75% of electricity, capacity 11 GW
20
Sweden's hydro capacity 16.6 GW generates 70 TWh yearly
21
Global small hydro (<10 MW) capacity is estimated at 85 GW
22
France's hydro capacity 25 GW, 12% of electricity
23
Hydropower added 25 GW new capacity globally in 2022
24
Austria generates 60% electricity from 6 GW hydro
25
Colombia's hydro capacity 12 GW, 70% of power mix
26
New Zealand's 5.4 GW hydro supplies 55-60% electricity
27
Global hydro capacity growth averaged 2.5% annually 2017-2022
28
Iran's hydro capacity 12.5 GW generates 50 TWh yearly
29
Chile's hydro capacity 7 GW, but growth limited by environment
30
Global hydro generation grew 1.3% in 2022 despite droughts
Interpretation
Capacity and Production Interpretation
While China's Three Gorges Dam is the undisputed heavyweight champion, the global hydropower story is a sprawling ensemble cast where nations from Norway to New Zealand are running the show on renewable rivers, proving that even with the occasional drought-induced drama, the flow of clean electricity is a relentless, powerhouse performance.
02 · Category
Economics and Costs28 stats
01
Global Levelized Cost of Electricity (LCOE) for hydro $0.05-0.17/kWh in 2022
02
Hydropower investment globally $50 billion annually 2017-2022 average
03
Capacity factor for hydro averages 40-50% globally
04
New hydro projects cost $1,500-3,000/kW installed
05
O&M costs for hydro 1-2% of capital cost annually, lowest among power sources
06
Hydropower provides $100 billion ecosystem services yearly (flood control, etc.)
07
China invested $25 billion in hydro in 2022
08
Payback period for large hydro 10-20 years
09
Small hydro (<10MW) LCOE $0.04-0.10/kWh, competitive
10
Hydropower revenue from ancillary services $10-50/MWh
11
Global hydro supports 2.5 million jobs directly
12
Retrofit costs for efficiency upgrades $200-500/kW
13
Pumped storage round-trip efficiency 70-85%
14
Hydropower avoided fuel costs $40 billion in US 2020
15
Financing costs 30-50% of LCOE for developing countries hydro
16
Brazil hydro LCOE average $35/MWh
17
Decommissioning costs negligible, <1% of lifecycle costs
18
Hydro provides baseload at $20-40/MWh marginal cost
19
Global hydro market value $150 billion in 2023
20
Insurance costs for dams 0.1-0.5% of asset value yearly
21
Revenue from hydro in Africa $5 billion potential untapped
22
US hydro generates $10 billion revenue annually
23
Cost overrun average 90% for large hydro projects
24
Hydro supports irrigation worth $200 billion globally
25
Pumped hydro investment needs $100 billion by 2030 for grids
26
Norway hydro exports $5 billion yearly
27
Small hydro creates 10 jobs/MW vs 2 for large
28
Hydropower LCOE declined 7% 2018-2022
Interpretation
Economics and Costs Interpretation
While hydropower’s stubbornly high up-front costs and notorious budget overruns demand a strong stomach for investment, its remarkably low and stable operating expenses, decades of reliable service, and generous side-hustle in flood control and grid stability make it the utility world’s quintessential "pay more now to laugh all the way to the bank later" asset.
03 · Category
Environmental Impact27 stats
01
Hydropower reservoirs store 23% of world's freshwater used by humans
02
Large dams fragment 60% of world's rivers longer than 1,000 km
03
Hydropower causes 1.3% of global GHG emissions from reservoirs
04
Tropical hydro reservoirs emit 0.5-1.3 tons CO2eq/MWh methane
05
Over 40 million people displaced by dams since 2000
06
Hydropower reduces flood peaks by 30-50% in regulated rivers
07
Salmon populations declined 90% due to hydro dams in Columbia River
08
Dams trap 95% of river sediment, causing coastal erosion
09
Global hydro reservoirs methane emissions equivalent to 1.3 GtCO2eq/year
10
470,000 km of rivers regulated by large dams, 23% of long rivers
11
Hydropower contributes to 20% biodiversity loss in freshwater ecosystems
12
Run-of-river hydro impacts smaller, GHG emissions 4-24 gCO2eq/kWh vs fossil 490-1000
13
Fish ladders enable 70-90% passage for some species, but <50% for others
14
Eutrophication in reservoirs affects 30% of large hydro sites
15
Hydropower drowns 1% of world's forests annually in tropics
16
Droughts reduced hydro output by 100 TWh in Brazil 2021
17
Dams alter river temperature by 1-5°C downstream, affecting ecosystems
18
Global hydro footprint 10.6 Mha land use
19
58% of large dams built primarily for irrigation, not power
20
Reservoir-induced seismicity in 25% of large dams >100m high
21
Hydropower lifecycle emissions 4-24 gCO2eq/kWh, lowest renewable
22
1,200+ fish species threatened by dams globally
23
Peaking hydro operations cause daily flow fluctuations harming aquatic life
24
Cumulative cultural heritage sites flooded by dams: 3,000+
25
Hydropower avoids 2.5 GtCO2 emissions yearly vs fossil fuels
26
Invasive species spread via reservoirs affects 15% of dams
27
Brazil's Belo Monte Dam displaced 20,000 people and flooded 500 km2
Interpretation
Environmental Impact Interpretation
We are drowning a quarter of humanity's freshwater to produce clean-ish electricity that saves us from fossil fuel emissions while systematically dismantling the planet's rivers, displacing millions, and transforming vibrant ecosystems into methane-belching, sediment-starved, and seismically questionable landscapes.
More related reading
04 · Category
Global and Regional Distribution30 stats
01
Asia holds 60% global hydro capacity
02
Latin America generates 65% electricity from hydro
03
Europe has 20% of world hydro capacity, mostly Alps/Nordics
04
North America 13% global capacity, Canada/US dominant
05
Africa 7% capacity but 25% potential, Congo Basin key
06
China added 10 GW hydro yearly average 2015-2022
07
Brazil 100 GW capacity, 2nd globally
08
India 10th largest at 46 GW, Himalayan focus
09
Russia 12th, Siberia rivers untapped potential 167 GW
10
Norway 95% electricity from hydro, export hub
11
Southeast Asia hydro growth 5 GW/year, Mekong issues
12
Middle East/North Africa low hydro 1%, Turkey exception 31 GW
13
Central Asia 50 GW potential, Kazakhstan/Uzbekistan developing
14
Oceania small share, Australia pumped storage leader
15
Top 10 countries 75% global capacity, China alone 32%
16
Mekong River Basin 23 GW existing, 100 GW potential
17
Himalayas supply 50% Asia fresh water, hydro hub India/Nepal/Bhutan
18
Congo River untapped 100 GW Africa largest potential
19
Alps generate 20% Europe electricity, Switzerland 60% hydro
20
Amazon Basin 150 GW potential, Brazil/Peru key
21
Yangtze River China 300 GW developed 70%
22
Patagonia Chile/Argentina 170 GW potential windy hydro combo
23
Volga-Don Russia 10 GW cascade
24
Parana River Brazil/Paraguay/Argentina 50 GW developed
25
Zambezi Africa 20 GW potential, Cahora Bassa 2 GW
26
Andes Peru/Ecuador/Bolivia 60 GW untapped
27
Scottish Highlands UK 2 GW hydro
28
Bhutan exports 70% 2 GW hydro to India
29
Laos Mekong dams 7 GW, export economy
30
Quebec Canada James Bay 16 GW complex
Interpretation
Global and Regional Distribution Interpretation
From the vast and untapped promise of the Congo to the powerhouse of the Chinese Himalayas, global hydropower is a story of incredible geographic luck, where a nation's rivers often write its energy destiny, and where development maps almost perfectly onto mountainous terrain—from the Alps to the Andes—leaving some regions literally overflowing with potential while others are running on every last drop.
05 · Category
Technology and Innovation26 stats
01
Run-of-river hydro efficiency 90-95%
02
Kaplan turbines used for low head <30m, efficiency 90-93%
03
Francis turbines dominant for 30-300m head, 90-96% efficiency
04
Pelton turbines for high head >300m, 88-93% efficiency
05
Variable speed pumped storage improves efficiency by 5-10%
06
Digital twins reduce downtime 20% in hydro plants
07
Fish-friendly turbines pass 95% juvenile fish unharmed
08
Modular small hydro units deploy in 12 months vs 5 years large
09
Floating solar-hydro hybrids boost capacity factor 20%
10
Supercapacitors enable 30s response for frequency regulation
11
3D printed turbine parts cut costs 30%
12
AI predictive maintenance saves 5-10% O&M costs
13
Ocean current hydro (tidal) pilots 1-10 MW scale
14
Hydrokinetic in-river turbines no dam, 35-45% efficiency
15
Pumped storage with seawater tested 20 MW Portugal
16
Retrofit turbines increase output 10-20%
17
Osmotic power (salinity gradient) pilots 1-5 kW
18
Remote sensing monitors sediment 95% accuracy
19
Battery-hydro hybrids stabilize output 99.9% availability
20
Cross-flow turbines for ultra-low head <3m, 60-70% efficiency
21
Global hydro potential 16,000 TWh/year exploitable
22
PHES to reach 340 GW by 2030 per IEA
23
Archimedes screw turbines for low head, fish-safe 80% survival
24
Drones inspect dams reducing costs 50%
25
Bulb turbines for very low head 5-30m, 90% efficiency
26
Global small hydro market grows 8% CAGR to 2030
Interpretation
Technology and Innovation Interpretation
Hydropower has become a masterclass in flexible efficiency, combining old-school mechanical brilliance—like fish-friendly Archimedes screws and AI-piloted digital twins—with new-stock rapid response, from 3D-printed parts to supercapacitors, proving that modern hydro is far more than just a dam good idea.
Reference
Cite This Report
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APA
Elena Vasquez. (2026, February 13). Hydropower Statistics. Gitnux. https://gitnux.org/hydropower-statistics
MLA
Elena Vasquez. "Hydropower Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/hydropower-statistics.
Chicago
Elena Vasquez. 2026. "Hydropower Statistics." Gitnux. https://gitnux.org/hydropower-statistics.
Sources & references
49 datasets cited across this report · attribution is report-level