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Mapping How the United States Generates Its Electricity

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Mapping How the United States Generates Its Electricity

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Plant capacity by power source

50

500

2000

5000MW

Natural Gas

Coal

Nuclear

Hydroelectric

Oil

Wind

Solar

Other

Plant capacity by power source

Oil

Coal

Natural Gas

Nuclear

Hydroelectric

Wind

Solar

Other

50

500

2000

5000MW

Wash.

Mont.

Maine

N.D.

Ore.

Minn.

Vt.

N.H.

Wis.

S.D.

Mass.

Idaho

N.Y.

R.I.

Wyo.

Mich.

Conn.

Pa.

Iowa

N.J.

Neb.

Ohio

Nev.

Md.

Ind.

Ill.

Del.

Utah

Colo.

W.Va.

Va.

Calif.

Kan.

Mo.

Ky.

N.C.

Tenn.

Okla.

Ariz.

Ark.

N.M.

S.C.

Ga.

Miss.

Ala.

La.

Tex.

Alaska

Fla.

Hawaii

Plant capacity by power source

50

2000

5000MW

500

Wash.

Mont.

Maine

N.D.

Ore.

Minn.

Vt.

N.H.

Wis.

S.D.

Mass.

Idaho

N.Y.

R.I.

Wyo.

Mich.

Conn.

Pa.

Iowa

N.J.

Neb.

Natural Gas

Ohio

Nev.

Md.

Ind.

Ill.

Del.

Utah

Coal

Colo.

W.Va.

Va.

Calif.

Kan.

Nuclear

Mo.

Ky.

Hydroelectric

N.C.

Tenn.

Okla.

Oil

Ariz.

Ark.

N.M.

S.C.

Wind

Ga.

Miss.

Ala.

Solar

La.

Tex.

Other

Alaska

Fla.

Hawaii

Plant capacity by power source

50

500

2000

5000MW

Wash.

Mont.

Maine

N.D.

Ore.

Minn.

Vt.

N.H.

Wis.

S.D.

Mass.

Idaho

N.Y.

R.I.

Wyo.

Mich.

Conn.

Pa.

Iowa

N.J.

Neb.

Natural Gas

Ohio

Nev.

Md.

Ind.

Ill.

Del.

Utah

Coal

Colo.

W.Va.

Nuclear

Va.

Calif.

Kan.

Mo.

Ky.

Hydroelectric

N.C.

Oil

Tenn.

Okla.

Wind

Ariz.

Ark.

N.M.

S.C.

Solar

Ga.

Other

Miss.

Ala.

La.

Tex.

Alaska

Fla.

Hawaii

Share of U.S. electricity generation

50%

Natural gas

Coal

Nuclear

Hydroelectric

Oil

Wind

0%

Solar

2001

2016

Local electric utilities take advantage of nearby resources - rivers in the Northwest, wind in the Midwest, coal in the Appalachian region, natural gas in the North - to generate the bulk of the nation's electricity. This shows the source of electricity generation in each state according to preliminary 2016 data.

Tap to rearrange

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Natural gas Coal Nuclear Hydro Wind Solar Oil Other
Natural gas-powered electric plants

There are 1,793 natural gas-powered electricity plants in the United States. They generated 34 percent of the nation's electricity last year.

Advances and expansion of fracking in the past decade have unlocked vast supplies of natural gas from shale deposits all over the country. The fuel is the primary source of electricity generation in 19 states and provides at least 50 percent of the electricity in nine states.

Coal

There are 400 coal-powered electric plants in the United States. They generated 30 percent of the nation's electricity last year.

Coal was the chief source of electrical generation in 19 states and the second most common source in another nine. Coal is most popular in the East, south of New York. Coal still accounted for at least 50 percent of generation in 13 states.

Nuclear

There are 61 nuclear electric plants in the United States. They generated 20 percent of the nation's electricity last year.

New nuclear plants are coming online following decades of pause after an initial push in the 1970s and 1980s driven by the first oil shock. Maryland joined South Carolina, Illinois, Pennsylvania, Connecticut and New Hampshire in getting a plurality of its power from nuclear last year. Twenty states have no nuclear electricity generation at all.

Hydro

There are 1,444 hydroelectric plants in the United States. They generated 7 percent of the nation's electricity last year.

It's a feast-or-famine source. Washington, Oregon, Vermont and Idaho lead the nation in power from hydroelectric plants, getting between 56 percent and 68 percent of their electricity from them. But Montana and South Dakota were the only other states where they were responsible for more than 5 percent of electricity. Government-run plants generate most of the power.

Wind

There are 999 wind-powered electric plants in the United States. They generated 6 percent of the nation's electricity last year.

Wind is the fastest-growing power source, finding a home in the Great Plains, where wind blows reliably across wide open spaces. Iowa got more than one-third of its power from wind, followed by Kansas, Oklahoma and South Dakota, which each got more than a quarter of their electricity from windmills. Wind is not the leading source of electric power anywhere but ranks second in seven states.

Solar

There are 1,721 solar-powered electric plants in the United States. They generated 1 percent of the nation's electricity last year.

Solar power is predominantly used in the Southwest, where the sun shines the most. The growth of solar has created plants in all but eight states. California gets almost 10 percent of its electricity from solar, and Nevada gets more than 6 percent. Vermont and Arizona follow with 4 percent each.

Oil

There are 1,076 oil-powered electric plants in the United States. They generated just over half of 1 percent of the nation's electricity last year.

Petroleum is no longer a popular source for electricity generation. After the rise of OPEC and the oil shocks and price increases of the 1970s, utilities switched to other fuels, mostly coal. Hawaii gets two-thirds of its electricity from oil, the only state where it is the leading energy source.

About this story

Energy Information Administration "Operable electric generating plants in the United States by energy source" at https://www.eia.gov/maps/map_data/PowerPlants_US_EIA.zip

Detailed output from EIA via EIA-860, Annual Electric Generator Report, EIA-860M, Monthly Update to the Annual Electric Generator Report and EIA-923, Power Plant Operations Report at http://www.eia.gov/electricity/monthly/

Other energy sources include petroleum coke, other gasses, biomass and geothermal.

Originally published July 31, 2015.

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Mapping how the United States generates its electricity

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Plant capacity by power source 50 500 2000 5000MW Natural Gas Coal Nuclear Hydroelectric Oil Wind Solar Other Plant capacity by power source Oil Coal Natural Gas Nuclear Hydroelectric Wind Solar Other 50 500 2000 5000MW Wash. Mont. Maine N.D. Ore. Minn. Vt. N.H. Wis. S.D. Mass. Idaho N.Y. R.I.

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School Energy Facts for Schools Going Solar

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Determining how much electricity your appliances and home electronics use can help you understand how much money you are spending to use them. Use the information below to estimate how much electricity an appliance is using and how much the electricity costs so you can decide whether to invest in a more energy-efficient appliance.

There are several ways to estimate how much electricity your appliances and home electronics use:

Reviewing the Energy Guide label. The label provides an estimate of the average energy consumption and cost to operate the specific model of the appliance you are using. Note that all not all appliances or home electronics are required to have an Energy Guide.

Using an electricity usage monitor to get readings of how much electricity an appliance is using

Calculating annual energy consumption and costs using the formulas provided below

Installing a whole house energy monitoring system.

Electricity Usage Monitors

Electricity usage monitors are easy to use and can measure the electricity usage of any device that runs on 120 volts. (But it can't be used with large appliances that use 220 volts, such as electric clothes dryers, central air conditioners, or water heaters.) You can buy electricity usage monitors at most hardware stores for around $25-$50. Before using a monitor, read the user manual.

To find out how many watts of electricity a device is using, just plug the monitor into the electrical outlet the device uses, and then plug the device into the monitor. It will display how many watts the device uses. If you want to know how many kilowatt-hours (kWh) of electricity the devices uses in an hour, or a day, or longer, just leave everything set up and read the display later.

Monitors are especially useful for finding the amount of kWh used over any period of time for devices that don't run constantly, like refrigerators. Some monitors will let you enter the amount your utility charges per kilowatt-hour and provide an estimate how much it cost to run the device since it was plugged into the monitor.

Many appliances continue to draw a small amount of stand-by power when they are switched "off." These "phantom loads" occur in most appliances that use electricity, such as televisions, stereos, computers, and kitchen appliances. Most phantom loads will increase the appliance's energy consumption a few watt-hours, and you can use a monitor to estimate those too. These loads can be avoided by unplugging the appliance or using a power strip and using the switch on the power strip to cut all power to the appliance.

Calculating Annual Electricity Consumption and Costs

Follow these steps for finding the annual energy consumption of a product, as well as the cost to operate it.

1. Estimate the number of hours per day an appliance runs. There are two ways to do this:
- Rough estimate
If you know about how much you use an appliance every day, you can roughly estimate the number of hours it runs. For example, if you know you normally watch about 4 hours of television every day, you can use that number. If you know you run your whole house fan 4 hours every night before shutting it off, you can use that number. To estimate the number of hours that a refrigerator actually operates at its maximum wattage, divide the total time the refrigerator is plugged in by three. Refrigerators, although turned "on" all the time, actually cycle on and off as needed to maintain interior temperatures.

- Keep a log
It may be practical for you to keep a usage log for some appliances. For example, you could record the cooking time each time you use your microwave, work on your computer, watch your television, or leave a light on in a room or outdoors.

2. Find the wattage of the product. There are three ways to find the wattage an appliance uses:
- Stamped on the appliance
The wattage of most appliances is usually stamped on the bottom or back of the appliance, or on its nameplate. The wattage listed is the maximum power drawn by the appliance. Many appliances have a range of settings, so the actual amount of power an appliance may consume depends on the setting being used. For example, a radio set at high volume uses more power than one set at low volume. A fan set at a higher speed uses more power than one set at a lower speed.

- Multiply the appliance ampere usage by the appliance voltage usage
If the wattage is not listed on the appliance, you can still estimate it by finding the electrical current draw (in amperes) and multiplying that by the voltage used by the appliance. Most appliances in the United States use 120 volts. Larger appliances, such as clothes dryers and electric cooktops, use 240 volts. The amperes might be stamped on the unit in place of the wattage, or listed in the owner's manual or specification sheet.

- Use online sources to find typical wattages or the wattage of specific products you are considering purchasing. The following links are good options:

The Home Energy Saver provides a list of appliances with their estimated wattage and their annual energy use, along with other characteristics (including annual energy use, based on "typical" usage patterns. Continue using the equations here if you want to find energy use based on your own usage patterns).

ENERGY STAR offers energy-use information on specific products that have earned the ENERGY STAR. The information varies across products, but if you are considering purchasing a new, efficient product, ENERGY STAR allows you to select and compare specific models. In some cases, you can use the provided information to do your own estimates using the equations here. The information may also help you compare your current appliances with more efficient models, so you understand potential savings from upgrading to a more efficient appliance.

3. Find the daily energy consumption using the following formula:
(Wattage × Hours Used Per Day) ÷ 1000 = Daily Kilowatt-hour (kWh) consumption

4. Find the annual energy consumption using the following formula:
Daily kWh consumption × number of days used per year = annual energy consumption

5. Find the annual cost to run the appliance using the following formula: Annual energy consumption × utility rate per kWh = annual cost to run appliance

Examples:
I. Following the steps above, find the annual cost to operate an electric kettle.
1. Estimate of time used: The kettle is used several times per day, for about 1 total hour.

2. Wattage: The wattage is on the label and is listed at 1500 W.

3. Daily energy consumption:
(1,500 W × 1) ÷ 1,000 = 1.5 kWh

4. Annual energy consumption: The kettle is used almost every day of the year.
1.5 kWh × 365 = 547.5 kWh

5. Annual cost: The utility rate is 11 cents per kWh.
547.5 kWh × $0.11/kWh = $60.23/year
II. Following the steps above, find the annual cost to operate a paper shredder.
1. Estimate of time used: The shredder is used for about 15 minutes per day (0.25 hour).

2. Wattage: The wattage is not listed on the label, but the electrical current draw is listed at 3 amperes.
120V × 3A = 360W

3. Daily energy consumption:
360 W × .25 ÷ 1000 = 0.09 kWh

4. Annual energy consumption: The shredder is used about once per week (52 days per year).
0.09 kWh × 52 = 4.68 kWh

5. Annual cost to operate: The utility rate is 11 cents per kWh.
4.68 kWh × $0.11/kWh = $0.51/year

Whole-House Energy Monitoring Systems

If you want more detailed data on your home's energy use (as well as the ability to measure the energy use of 240-volt appliances), you might consider installing a whole-house energy monitoring system. The features of these systems vary, and the cost and complexity depends on the number of circuits you want to monitor, the level of detail of the data, and the features available. The monitors are often installed directly in the main breaker panel of the home, and some may require an electrician to install. Some monitors must be connected with your home's wireless network and data is viewed on a computer or smartphone, while others come with a dedicated display.

In addition to providing information on the energy consumption of your appliances, these monitors help you understand where and when you use the most energy, allowing you to develop strategies to reduce your energy use and costs.

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Estimating Appliance and Home Electronic Energy Use

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Determining how much electricity your appliances and home electronics use can help you understand how much money you are spending to use them. Use the information below to estimate how much electricity an appliance is using and how much the electricity costs so you can decide whether to invest in a more energy-efficient appliance.

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Handout to Accompany Energy.gov website

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Needs vs Wants EnergyGov Typical Wattages of Various Appliances