Resource Use: October 2024

Supply and fuel consumption

In this section, we look at the resources used to produce electricity. Generating units are chosen to run primarily on their operating costs, of which fuel costs account for the lion's share. Therefore, we present below, electricity generation output by fuel type and generator type. Since the generator/fuel mix of utilities varies significantly by region, we also present generation output by region.

Generation output by region

Net electricity generation in the United States increased by 2.2% compared to October 2023. At the regional level, only Florida saw a decrease in electricity generation compared to the previous year. All other regions saw a year-over-year increase in electricity generation, with Texas seeing the largest percent increase (up 5.4%) compared to the previous October. This large increase in Texas’s electricity generation occurred because it experienced its hottest October on record, leading to an increased demand for electricity generation compared to a normal October.

Electricity generation from coal decreased in all parts of the country, except the Southeast, compared to October 2023. Electricity generation from natural gas increased in all parts of the country, except in the West. Other renewables generation increased in all regions of the country, with the Northeast experiencing the largest year-over-year increase (up 20.1%) compared to the previous October.

Fossil fuel consumption by region

The chart above compares coal consumption in October 2023 and October 2024 by region and the second tab compares natural gas consumption by region over the same period. Changes in coal and natural gas consumption were similar to their respective changes in coal and natural gas generation.

The third tab presents the change in the relative share of fossil fuel consumption by fuel type on a percentage basis, calculated using equivalent energy content (Btu). This highlights changes in the relative market shares of coal, natural gas, and petroleum. All regions of the country, except the Southeast, saw their share of natural gas increase at the expense of coal.

The fourth tab presents the change in coal and natural gas consumption on an energy content basis by region. The changes in total coal and natural gas consumption were similar to the changes seen in total coal and natural gas net generation in each region.

Fossil fuel prices

To gain some insight into the changing pattern of consumption of fossil fuels over the past year, we look at relative monthly average spot fuel prices. A common way to compare fuel prices is on an equivalent $/MMBtu basis as shown in the chart above. The average price of natural gas at Henry Hub decreased from the previous month, going from $2.37/MMBtu in September 2024 to $2.24/MMBtu in October 2024. The natural gas price for New York City (Transco Zone 6 NY) increased in price from the previous month, going from $1.61/MMBtu in September 2024 to $1.70/MMBtu in October 2024. The average spot price of Central Appalachian decreased from the previous month, going from $3.44/MMBtu in September 2024 to $3.25/MMBtu in October 2024.

A fuel price comparison based on equivalent energy content ($/MMBtu) does not reflect differences in energy conversion efficiency (heat rate) among different types of generators. Gas-fired combined-cycle units tend to be more efficient than coal-fired steam units. The second tab shows coal and natural gas prices on an equivalent energy content and efficiency basis. The Henry Hub natural gas price ($17.92/MWh) saw a decrease from the previous month ($19.00/MWh) and was well below the Central Appalachian coal price ($35.08/MWh) in October 2024. The price of natural gas at New York City ($13.65/MWh) increased from the previous month ($12.92/MWh) and was well below the Central Appalachian coal price ($35.08/MWh) during October 2024.

The conversion shown in this chart is done for illustrative purposes only. The competition between coal and natural gas to produce electricity is more complex. It involves delivered prices and emission costs, the terms of fuel supply contracts, and the workings of fuel markets.