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Six US states to keep an eye on as rising gas costs drive a return of coal: Maguire

The rise in natural gas prices has prompted several U.S. utility companies to increase coal power production and reduce gas-fired generators so far this season, reversing years of declining coal use and emissions.

If natural gas prices continue to rise, the six states of Arkansas, Indiana Michigan, Ohio South Carolina, and Wisconsin will have a greater influence on the future direction of coal usage in the United States.

These six states are able to switch between coal and gas as the market dictates.

The U.S. wholesale gas prices are up by 44% in the last year and nearing multi-year highs. This means that utilities will likely switch from coal to natural gas in areas under pressure to control power bills despite a rise in demand.

GAS PRICE INFLATION

LSEG data shows that benchmark U.S. Natural Gas Futures averaged $3.57 per Million British Thermal Units (mmBtu), so far in 2025.

This compares with an average of $2.47/mmBtu in 2024. It means that consumers who use a lot of gas will be hit by a sharp increase in prices in 2025, even though lowering the price has been a priority for nearly all U.S. authorities.

LSEG data shows that several utilities are burning more coal to cut costs. This is because coal prices in the U.S. this year averaged about 20% less than gas and only 7% higher than 2024's average.

Ember data show that the total U.S. coal fired electricity production in the first seven months of this year was up around 16% compared to the previous year, reflecting the increased coal usage across the nation.

In response to cost-saving measures undertaken by several utilities, the U.S. generated electricity from gas decreased by around 4% over the same period.

The "Key 6" States

Several states have increased their coal consumption and decreased their gas usage by a much greater amount than the U.S. national average. This has had a significant impact on national trends in coal and gas consumption this year.

Ember data indicates that the combined coal-fired production across Arkansas, Indiana Michigan Ohio South Carolina and Wisconsin (the "Key 6") has increased by 26% in 2025 while their collective gas consumption has decreased by 9%.

The coal use in these states peaked in the first months of 2025 when gas prices soared by a large amount year over year, and utilities that had both coal and natural gas assets shifted their output to coal.

Arkansas, Michigan, and Wisconsin have all reduced their gas-fired generation by more than twice the national average. They also increased coal-fired production to multi-year-highs.

Gas prices are at their highest level since 2023, and they will continue to rise due to increased heating use and the strong demand for LNG from exporters. Cost-conscious utilities may switch to gas in the coming months.

Emissions Toll

The U.S. power industry will see a new surge in emissions as coal consumption increases.

Ember data indicates that coal-fired power generation in the U.S. emits approximately 950,000 metric tonnes of CO2 per Terawatt Hour (TWh), as opposed to 550,000 tons from gas-fired power generation.

The pressure to control costs will continue the trend of reducing gas consumption when gas prices rise, and plugging any generation shortages that result with an increase in coal-fired production.

In the short term, the increased federal support for coal-fired electricity and coal mining is expected to maintain momentum in favor coal. It will also provide utilities with political cover against consumers who are opposed to a coal revival.

In the long run, the continued increase in coal pollution, along with the retirement of coal plants that are decades old, will force utilities, particularly as the size of renewables and battery storage increases, to reduce coal power production again.

The coal-fired production across the Key 6 States - and in general - is expected to continue growing.

These are the opinions of the columnist, an author for.

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(source: Reuters)