Resource Use: June 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 9.2% compared to the previous June. All regions of the country experienced this year-over-year increase in electricity generation, a result of each region experiencing above average temperatures this June compared to the previous year. This led to an increased demand for residential cooling in all these regions and thus, an increase in electricity generation to meet this demand. The only region with a negligible increase in year-over-year electricity generation was Texas (up only 0.2%). Texas did experience a hotter June compared to the previous year, but the region experienced a rather hot June 2023 as well, so the increase in electricity generation was relatively minor.

The change in electricity generation from coal was mixed throughout the country, with the MidAtlantic, Southeast, and Florida all seeing a year-over-year increase in coal generation. The Central, West, and Texas saw a decrease in coal generation compared to the previous year, while the Northeast saw no change. The change in electricity generation from natural gas was also mixed, with the Northeast, MidAtlantic, Southeast, Florida, and West all seeing an increase in natural gas generation, while Texas and the Central region saw a decrease in electricity generation from natural gas compared to June 2023.

Fossil fuel consumption by region

The chart above compares coal consumption in June 2023 and June 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. The MidAtlantic, Southeast, and Florida all saw their share of coal increase at the expense of natural gas, while the MidAtlantic, Southeast, and Florida all 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 increased from the previous month, going from $2.18/MMBtu in May 2024 to $2.54/MMBtu in June 2024. The natural gas price for New York City (Transco Zone 6 NY) also increased in price from the previous month, going from $1.60/MMBtu in May 2024 to $1.82/MMBtu in June 2024. The average spot price of Central Appalachian coal increased from the previous month, going from $3.22/MMBtu in May 2024 to $3.46/MMBtu in June 2024.

The New York Harbor residual oil price increased slightly from the previous month, going from $12.91/MMBtu in May 2024 to $12.93/MMBtu in June 2024. As is the case in most months, oil was priced out of most electricity markets for baseload operations during the month.

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 ($20.31/MWh) saw an increase from the previous month ($17.42/MWh) and was well below the Central Appalachian coal price ($37.39/MWh) in June 2024. The price of natural gas at New York City ($14.58/MWh) increased from the previous month ($12.81/MWh) and was well below the Central Appalachian coal price ($37.39/MWh) during June 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.