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Energy in the United States

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Overall energy consumption in 2021[1]

Energy in the United Statesis obtained from a diverse portfolio of sources, although the majority came fromfossil fuelsin 2021, as 36% of the nation'senergyoriginated frompetroleum,32% fromnatural gas,and 11% fromcoal.Electricity fromnuclear powersupplied 8% andrenewable energysupplied 12%, which includesbiomass,wind,hydro,solarandgeothermal.[1]

Energy figures are measured inBTU,with 1 BTU equal to 1.055kJand 1 quadrillion BTU (1quad) equal to 1.055 EJ. Because BTU is a unit ofheat,sources that generate electricity directly are multiplied by a conversion factor to equate them with sources that use aheat engine.[2]

The United States was the second-largest energy producer and consumer in 2021 afterChina.[3]The country had a per capita energy consumption of 295 million BTU (311 GJ), ranking it tenth in the world behindCanada,Norway,and severalArabian nations.[3]Consumption was mostly for industry (33%) and transportion (28%), with use in homes (21%) and commercial buildings (18%) making up the remainder.[4][5]

The United States' portion of theelectrical grid in North Americahad anameplate capacityof 1,213GWand produced 3,988TWhin 2021, using 37% of primary energy to do so.[6][7]The country is the second-largest producer and consumer of electricity, behind China.[3]Natural gas overtook coal as the dominant source for electric generation in 2016. While coal use has been dropping, it remained larger than either nuclear or renewables.[6]

History[edit]

Per capita energy use by source
The percentage of energy use by source

From its founding until the late 19th century, population and energy use in the United States both increased by about 3% per year,[8][9]resulting in a relatively constant per capita energy use of 100 million BTU.Woodmade up the majority of this until near the end of the 1800s, meaning the average American burned eight tons of wood each year.[10]

TheIndustrial Revolution in the United Statessaw an increased use ofcoal.By the late 1800s, it surpassed wood as the major source of energy, as it was cheaper for those living in cities. Lighting, heating and transportation could all be fueled by coal.[11]Between 1925 and 1975, coal use was more stagnant, although it dominated the growing electricity sector.[12]Petroleumandnatural gastook its place, as car ownership doubled in the two decadesafter the war,[13]and asthe number of pipelinesrose dramatically.[14]

During the first half of the 20th century, per capita energy use doubled to 200 million BTU, and reached 300 million BTU by the late 60s. After a peak of 360 million BTU in 1979, per capita consumption generally declined, and dipped below 300 million BTU in 2020.[15]In comparison, the world average increased from 68 to 74 million BTU (72 to 78 GJ) per person between 1980 and 2020.[3]

Domestic oil production peaked in 1970 and did not recover for 40 years. However,oilimports allowed consumption to double. Oil represented the vast majority of net imports during this time.[16]Increased reliance on imported oil coincided with the1973 oil crisis.

Total imports peaked in 2005, when they represented 30% of total consumption. A consistent decline occurred over the next 15 years, as oil production doubled and domestic use receded. This allowed the United States to be a net exporter of energy for the first time in 70 years. As of 2021, the US net exports 3.9% of energy production.[16]

Around 2010, many other trends began to reverse. By 2020, improvements infrackinghad allowednatural gasproduction to increase by more than half,[17]while coal decreased by half.

Renewablesin the 20th century consisted mainly ofhydroand wood. Hydro power had been relatively constant since 1970, while wood saw a bump in 1980. Between 2000 and 2020, wind, solar and biofuels increased by a factor of ten. By 2020, wind had surpassed hydro, and biofuels had surpassed wood.[18]

Summary[edit]

US energy consumption
by source (2021)[1]
Source % of source
Nuclear 8% 100% Electricity
Renewable
12% 		 6.9% Residential
 2.6% Commercial
19.6% Industrial
12.3% Transport
58.6% Electricity
Natural gas
32% 		15.4% Residential
10.8% Commercial
33.4% Industrial
 3.9% Transport
36.5% Electricity
Coal
11% 		 0.1% Commercial
 9.8% Industrial
90.0% Electricity
Petroleum
36% 		 2.6% Residential
 2.4% Commercial
25.0% Industrial
69.3% Transport
 0.6% Electricity
US electricity
by source and sector (2021)
Source Electricity Sector
22.2% Nuclear
19.5% Renewable
31.7% Natural gas
26.0% Coal
 0.6% Petroleum

Sales
35%

Losses
65%

38.9% Residential
34.9% Commercial
26.0% Industrial
0.02% Transport
US energy flow, 2022. Note the loss of waste energy due to the nature ofheat engines.
US energy consumption
by sector (2021)
Sector % of sector
Residential
21% 		 4.0% Renewable
23.5% Natural gas
 4.5% Petroleum
68.0% Electricity
Commercial
18% 		 1.8% Renewable
19.7% Natural gas
 0.1% Coal
 4.8% Petroleum
73.6% Electricity
Industrial
33% 		 7.3% Renewable
32.6% Natural gas
 3.2% Coal
27.2% Petroleum
29.7% Electricity
Transport
  28%[19] 		 5.5% Renewable
 4.5% Natural gas
89.8% Petroleum
0.2% Electricity

Primary energy production[edit]

Overall energy sources, 2021.[20]

The United States is the world's second-largest producer of energy. It produces 16% of the world's energy, about three-fourths as much as China.[3]Since 2019, the country has been a net exporter of energy. In 2021, 97.8 quads were produced and net exports were 3.9% of production.[16]

Fossil fuels[edit]

Fossil fuelshave long produced most energy in the US, currently accounting for 79% of total production[20]and 61% of electric generation.[12]Although costs for some fossil fuels are declining, renewables are becoming cheaper faster.[21]Despite this, use of fossil fuels has remained near 80% for the past 30 years.[20]

The vast majority ofcarbon emissionsin the US came from fossil fuels.[22]The largest sources for carbon pollution from energy were petroleum (46%), natural gas (35%) and coal (19%),[23]and of petroleum, motor gasoline (21%) and diesel (12%) were the largest contributors. As gas has been replacing coal, emissions from the two combined have declined from a peak in 2008, down 25% as of 2021. During the same time frame, petroleum declined by only 17%.

Coal[edit]

Main article:Coal power in the United States
See also:List of coal-fired power stations in the United States

Coalmade up 11% of production in 2021,[20]90% of which went to producing electricity.[12]Coalelectrifiedrapidly throughout the 50s, 60s and 70s and half of annual electricity was from coal until the 2010s. Coal peaked in 2006, when it represented a third of total energy production. During the 2010s it underwent a steady decline, mostly being replaced by natural gas. In contrast, net exports have remained near 2 quads in the same time period, but this now amounts to 17% of total production.[24]

The decline of coal has many factors, including the aforementioned rise of natural gas, the closing of old plants, and environmental regulations.[25]Coal supply has not become an issue, as the US has the largest coal reserve in the world, 40% larger than Russia.[3]

The first DC plant in the US was a coal plant inNew York City,opened in 1882. The first AC plant was a coal plant inEhrenfeld, Pennsylvania,opened in 1902.[26]Among the largest plants still operating is theJames H. Miller Jr. Electric Generating PlantinWest Jefferson, Alabama[27]and among the oldest is the James E. Rogers Energy Complex inMooresboro, North Carolina.[28]

Natural gas[edit]

Main article:Natural gas in the United States
See also:List of natural gas-fired power stations in the United States
US natural gas production, imports, and exports
Natural gas production by field

Drynatural gaswas 36% of production in 2021, making it the largest source of energy in the US.[20]It is also the largest electricity source, making up 38% of generation.[12]Natural gas surpassed coal for production in 2011 and for generation in 2016. Between 2006 and 2022, the US has gone from net importing 4 quads of natural gas to exporting 4 quads.[24]

The United States has been the world's largest producer of natural gas since 2011, when it surpassedRussia.However, the US ranks 7th in proven reserves.[3]Differences in supply explain why gas is cheaper in the US than it is in Europe.[29]

Among the largest natural gas power plants in the US isWest County Energy CenterinPalm Beach County, Florida.[30]Philadelphiahad the first natural gas distributor in the US.[31]

Natural gas liquidsare liquid hydrocarbons obtained from natural gas fields. Production has tripled from 2000 to 2022, now making up 9% of fossil fuels.[20]The US leads the world in NGL production, ahead of Saudi Arabia.[3]

During the 2023-24 winter heating season in the United States, natural gas inventories ended at 2,290 billion cubic feet (Bcf), 39% above the five-year average, due to mild weather resulting in reduced consumption. Withdrawals from storage were approximately 1,500 Bcf, lower than the usual 2,000 Bcf. By March 2024, theHenry Hubspot price had decreased to $1.50 per million British thermal units (MMBtu), significantly below the forecasted $3.10/MMBtu, with expectations of prices staying below $2.00/MMBtu until the second half of 2024, averaging $2.20/MMBtu for the year[32]

Petroleum[edit]

Main article:Petroleum in the United States
US oil production, imports, and exports

Crude oilmade up 24% of production in 2021.[20]Oil has more than doubled from a slump in the early 2000s, even surpassing its previous peak in 1970. Imports have declined during the same time period, but the US still net imports 20% of consumption.[24]

The US has been the largest producer of crude oil since 2018, ahead of Saudi Arabia.[3]Texas produces far more oil than any other state.[33]

Nuclear[edit]

Cherenkov radiation
Main article:Nuclear power in the United States

Nuclear powerwas 8.3% of total production[20]and 18.8% of electric generation[34]in 2021. Seven states made up half the total:Illinois(12%),Pennsylvania(10%),South Carolina(7%),Alabama(6%),North Carolina(6%),Texas(5%) andTennessee(5%).

The US generated 772 TWh of nuclear power in 2022, surpassingChina(395 TWh) andFrance(282 TWh). However, nuclear power constitutes a much smaller percentage of total power generation (18%) when compared to France (63%).[35]

Nuclear had significant growth from the 70s through the 90s, but has stagnated since.[20]A cessation of new nuclear plant construction coincided with theaccident at Three Mile Island.[36]Future growth may come from smaller reactors.[37]

Among the largest nuclear plants in the US areGrand GulfinClaiborne County, MississippiandPeach BottominYork County, Pennsylvania.[38]The oldest reactor still in commercial operation isNine Mile PointinScriba, New York.[39]

Renewables[edit]

Renewable energy sources, 2021.[20]
Main article:Renewable energy in the United States

Renewable energyin the United States accounted for 12.5% of the total production in 2021,[20]and 20.7% of electric generation.[34]The category has seen rapid growth, doubling in total output between 2000 and 2020. They have exceeded nuclear since 2011 and surpassed coal in 2020 for the first time since wood fuel fell out of use.[20]

Renewables are expected to continue growing.[40]Because many of these arevariable renewable energy,there are plans for considerable growth inbattery storage.[41]

Biomass[edit]

See also:Biofuel in the United States
An ethanol plant inNevada, Iowa
Wood burner inScotia, California

Biomassmade up 5% of total production and 38% of renewables in 2022.[20]About 49% of this wasbiofuels,43% waswood,and 8% waswasteand other biomass.

Ethanolmade up the majority of biofuels in 2022, whilebiodieseland renewable diesel made up about 16%. For ethanol, about 40% of the available energy is lost or diverted to co-products during the manufacturing process,[42]and the equivalent of 20% is used to power and run the equipment.[43]About 45% of domestic corn output goes toward producing ethanol.[44]The US led the world in ethanol production in 2021, producing more than half of the total.[45]The US is a net exporter of biofuels.

Use of biofuels increased by a factor of 10 between 2000 and 2020, eventually exceeding wood.[18]The desire for ethanol originated from the need to replacemethyl tert-butyl ether,which was contaminating groundwater.[46]TheEnergy Policy Act of 2005mandated an increased use of ethanol.[47]Mostgasolinesold in the US contains up to 10% ethanol.[48]

Industry uses two-thirds of the wood fuel in the US, while the residential sector uses about a quarter.Woodandpaperfactories use wood waste on-site to reduce their energy costs. About 9% of homes usedfirewoodin 2020.[49]

Wood made up the majority of energy consumption until near the end of the 1800s, after which it declined in total use for several decades, to about half its peak.[9]The 80s saw the first significant increase in over a century, of about 65%, before declining again by the 2010s.[18]

Geothermal[edit]

McGinness Hillsin Nevada
Main article:Geothermal energy in the United States

Two-thirds of thegeothermal energyin the US in 2021 was electric, with the remainder being direct use and heat pumps.[18][50]Geothermal powermade up 2% of renewable generation,[34]70% of which came from California.[51]The Geysersis the largest complex of geothermal energy production in the world.[52]The US ranks first in geothermal capacity, ahead ofIndonesiaand thePhilippines.[53]

Hydro[edit]

Grand Coulee Damin Washington
Main article:Hydroelectricity in the United States

Hydromade up 6% of electric generation and 29% of renewable generation in 2021.[34]Three states made up over half of the total:Washington(29%),New York(12%) andOregon(11%).[51]Overall 246 TWh were generated across 1,449 conventional plants and 40pumped storageplants.[54]As of 2021, the US was fourth in the world in total hydroelectric generation behind Canada and Brazil, each generating over 350 TWh. China produced the most, with an estimated 1,300 TWh.[53]

Hydro has been used in the US since 1880 when it powered the Wolverine Chair factory inGrand Rapids, Michigan.[55]By 1950, 29% of total electricity production came from hydro, as it produced 96 TWh.[6]Hydro generation had tripled by the 70s, but has not consistently grown since. Hydro has had large flucuations from year to year: for example in 2010, generation jumped from 253 to 311 TWh the next year, before dropping to 269 TWh the year after that. While hydro has maintained generation in the 200 to 350 TWh range for the past few decades, its share of the total has declined as other sources have risen. Since 2019, wind power has exceeded hydro as the largest renewable electricity source.[6]

At 132 years old, the plant inWhiting, Wisconsinis the oldest power plant still running in the US.[55]TheGrand Coulee Damis the largest plantfor hydroandin generalin the US, and the fifth-largest hydro plantin the world.Built in Washington in 1942, it continues to operate with a capacity of 6,765 MW.[55]TheBath County Pumped Storage Stationis the second-largest such facility in the world, with a capacity of 3,003 MW.[56]

Solar[edit]

Concentrated solar thermalplant (Ivanpah Solar)
Main article:Solar power in the United States

Solarmade up 4% of electric generation and 19% of renewable generation in 2021. Of the 164 TWh generated, 70% was by utilities and an estimated 30% was small-scale such as rooftop solar.[34]Three states made up over half of total grid generation:California(30%),Texas(13%) andNorth Carolina(9%).[51]In 2021, the US grid produced the second most solar power in the world, behind China's 328 GWh.[53]

Since 2006, solar has been the fastest growing energy source in the US, expanding 50% per year on average.[12]The largest solar farms in the US includeSolar StarinRosamond, California,Desert SunlightinDesert Center, CaliforniaandCopper MountaininBoulder City, Nevada.[57]TheBureau of Land Managementleases federal land to be used for solar farms.[58]

Almost all states employnet meteringto compensate owners of small-scale solar, althoughpolicies by statevary considerably.[59]

Wind[edit]

Wind turbines inMaine
Main article:Wind power in the United States

Windmade up 9% of electric generation and 44% of renewable generation in 2021.[34]Four states made up over half of the total:Texas(26%),Iowa(10%),California(9%) andKansas(7%).[51]The US grid produces significantly more wind power than Germany or India, but less than half of China.[53]

Since 1998, wind power has grown 23% per year on average in the US.[12]Prominent areas for wind turbines includeAlta WindinKern County, California,Shepherds FlatinGilliam County, OregonandRoscoe Wind FarminNolan County, Texas.[57]

Final energy consumption[edit]

Consumption by sector, 2021
An example of each consumption sector: a refinery, a house, a car and an office

Industryhas long been the country's largest energy sector.[4][5]It used 33% of total energy in 2021, most of which was divided evenly between natural gas, electricity and petroleum. A survey from 2018 estimated that the largest energy users were thechemical industry(30%),petroleumandcoalprocessing (18%),mining(9%) andpaper(9%).[60]

The most energy-intensive industry was by far petroleum and coal, at over 30 billion BTU per employee. The paper industry was second at 6.5 billion BTU per employee. Each of these handles energy sources as part of their raw materials (fossil fuels and wood).[61]The same survey found that half of the electric use was to drive machines and about 10% each for heating, cooling and electro-chemical processes. Most of the remainder was for factory lighting andHVAC.About half of the natural gas was for process heating, and most of the rest was forboilers.[62]

Transportationused 28% of energy, almost all of which was petroleum and other fuels. Half of the combustible fuels that make up the transportation sector weregasoline,and half of the vehicle usage was forcarsand small trucks.[63]Dieselandheavier truckseach made up about a quarter of their respective categories;jet fuelandaircraftwere about a tenth each. Biofuels such as ethanol and biodiesel made up 5%, while natural gas was 4%. Electricity frommass transitwas 0.2%; electricity for light passenger vehicles is counted in other sectors, but figures from the US Department of Energy estimate that 2.1 million electric vehicles used 6.1 TWh to travel 19 billion miles, indicating an average fuel efficiency of 3.1 miles per kWh.[64]

Over two-thirds of the energy used by homes, offices, and other commercial businesses is electric, includingelectric losses.[65][66]Most of the energy used in homes was for space heating (34%) andwater heating(19%), much more than the amount used for space cooling (16%) andrefrigeration(7%).[67]Businesses use similar percentages for space cooling and refrigeration. They use less for space and water heating but more forlightingand cooking.[68]

Most homes in the US aresingle-family detached,[69]which on average use almost triple the energy ofapartmentsin larger buildings.[70]However, single family households have 50% more persons and triple the floor space. Usage per square foot of living space is roughly equal for most housing types except small apartment buildings andmobile homes.Small apartments are more likely to be older than other housing types,[71]while mobile homes tend to have poorinsulation.[72]

Regional variation[edit]

The state with the lowest per capita energy use isRhode Island,at 161 million BTU per year, and the highest isLouisiana,at 908 million BTU per year. Energy use and prices often have an inverse relationship;Hawaiiuses some of the least energy per capita but pays the highest price on average, while Louisiana pays the least on average.[73]

Residential prices follow a similar trend, but the differences between states are usually less drastic. The exception is Hawaii, which pays 84 cents per million BTU, more than double the next largest state ofFlorida,which pays 33 cents.[74]

Household energy use varies by home type and by region. Although single-family detached homes are less common in theNortheast,the average house there uses 60% more energy than one in theWest.Some of the regional differences can be explained by climate, as two-thirds of northeastern homes are in cold regions, while less than a third of western homes are.[75][76]

  • Overall use per capita
    Overall use per capita
  • Home use per capita
    Home use per capita
  • Overall price per million BTU
    Overall price per million BTU
  • Home price per million BTU
    Home price per million BTU

The land-use decisions of cities and towns also explain some of the regional differences in energy use.Townhousesare more energy efficient than single-family homes because less heat, for example, is used per person. Similarly, areas with more homes in a compact neighborhood encourage walking, biking and transit, thereby reducing transportation energy use. A 2011 U.S. EPA study found that multi-family homes in urban neighborhoods, with well-insulated buildings and fuel-efficient cars, use less than two-thirds of the energy used by conventionally built single-family houses in suburban areas (with standard cars).[77]

Electricity[edit]

Main article:Electricity sector of the United States
Generation by source[12]

The United States is the world's second-largest producer and consumer of electricity. It generates 15% of the world's electricity supply, about half as much as China.[78]

The United States produced 3,988 TWh in 2021. Total generation has been flat since 2010. Net electricity imports were 39 TWh, or about 1% of sales. Historically, net imports have been between just under 0% to just over 1.5%.[6]

Fossil fuelsmade up the majority of generation, with natural gas providing 38% and coal 23%. Petroleum provided less than 1%. Natural gas as a proportion of fossil fuels has been increasing since the 90's, with coal peaking around 2008 and natural gas becoming the top fossil fuel in 2016.[12]

Nuclear provided 20%, a level consistent since about 1990. Nuclear surpassed coal in 2020 for the first time, as coal dipped to its lowest proportion in over 70 years.

Among renewables, wind and solar continued to expand, with wind exceeding hydro since 2019. Renewable use has doubled from 2010 to 2020, reaching 21% of total generation.

  • Monthly TWh by source
    Monthly TWh by source
  • Monthly TWh by renewable source
    Monthly TWh by renewable source
  • Yearly TWh by source
    Yearly TWh by source
  • Yearly TWh by renewable source
    Yearly TWh by renewable source

Grid capacity[edit]

See also:North American power transmission grid

The United States had anameplate generation capacityof 1,213 GW in 2021.[7]The following table summarizes the electrical energy generated by fuel source for the United States grid in 2021. Figures account for generation losses, but not transmission losses. Fission had the highestcapacity factor,while petroleum had the lowest.

The US grid first connected East and West in 1967.[79]There are over 7,300 power plants and almost 160,000 miles of high voltage lines.[80]

US electric grid capacity and generation in 2021[6][7]
Source Capacity
(GW) 		Generation
(TWh) 		Capacity
factor
Natural Gas 559.3 1480.1 30%
Coal 228.0  892.3 45%
Fission 100.0  778.2 89%
Wind 133.5  377.9 32%
Hydro  80.0  245.3 35%
Solar  61.9  114.5 21%
Petroleum  32.5   18.3  6%
Biomass  14.1   26.7 22%
Geothermal   3.9   15.5 45%
Total 1,213 3,988 37%
  • Electric plants by capacity
    Electric plants by capacity
  • Natural Gas plants by capacity
    Natural Gas plants by capacity
  • Coal plants by capacity
    Coal plants by capacity
  • Fission plants by capacity
    Fission plants by capacity
  • Wind plants by capacity
    Wind plants by capacity
  • Hydro plants by capacity
    Hydro plants by capacity
  • Solar plants by capacity
    Solar plants by capacity
  • Biomass plants by capacity
    Biomass plants by capacity
  • Petroleum plants by capacity
    Petroleum plants by capacity
  • Geothermal plants by capacity
    Geothermal plants by capacity

Generation by state[edit]

Generation by state and source

The following figures offer detail into the sources of generation used in each state.[51]Most often, natural gas is the largest source in a given state, with 22 states using it more than any other. Among renewable sources, 18 states use wind power more than any other.

Though not always the most prominent source, each state will use at least one source at a rate above the national average. Twelve states use nuclear power more than average, and California and Hawaii each use more solar and petroleum, respectively.

Texas contributes more to the grid than any other state, followed by Florida, Pennsylvania and California. On net, Pennsylvania exports the most power, while California imports the most.

  • Largest generation source
    Largest generation source
  • Largest renewable generation source
    Largest renewable generation source
  • Most over-represented source
    Most over-represented source
  • Net electricity imports/exports
    Net electricity imports/exports

Electric consumption[edit]

Home electrification

Electric grid consumptionin the US was 3,806 TWh in 2021. Since 2010, total consumption has remained within 2% of this figure. Per capita consumption was 11.5 MWh in 2021, down 8% from its peak in 2007.[81][82]

Residential customers used 39% of total electricity.[81]Each month, the average customer used 886 kWh and paid $121 at an average rate of 13.7 cents/kWh.[83]The commercial sector used 35% and industrial used 26%. Transportation used less than half of one percent.

System loss within the grid includes use in the generation process and transmission losses, as well as unaccounted loads. For 2021, this amounted to 203 TWh, or 5.3% of grid generation. Electricity used directly at the commercial or industrial level added 139 TWh, so total consumption was 3,945 TWh.[84]

The northeastern US has long paid the highest electricity prices, while simultaneously using it the least per capita.[85]Californiais an outlier in the west region; its neighbors tend to pay some of the lowest rates in the country, while California is second only toHawaiiandAlaska.

  • Overall use per capita
    Overall use per capita
  • Home use per capita
    Home use per capita
  • Overall price per kWh
    Overall price per kWh
  • Home price per kWh
    Home price per kWh

See also[edit]

References[edit]

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External links[edit]

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