Natural Gas Replaced Coal in Ohio Power Grid
Ohio transitioned to natural gas as its primary electricity source amid a decade of coal plant retirements.
Updated on Oct. 5, 2026 in Utilities
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By 2024, natural gas overtook coal as the leading source of electricity generation in Ohio. This shift followed the retirement of major coal-fired power stations over the previous decade due to environmental regulations and market pressures.
Why it matters
The transition reflects broader efforts to balance grid reliability with environmental compliance, even as regional supply challenges emerge. The PJM Interconnection grid operator now faces a significant capacity shortfall in upcoming years as demand continues to climb.
Ohio operated 16,365 megawatts of natural gas capacity and 6,621 megawatts of coal capacity in 2024. Total electricity production rose to 142.7 million megawatt-hours in 2024, up from 134.5 million in 2014.
The players
PJM Interconnection
This regional transmission organization coordinates the movement of wholesale electricity in all or parts of 13 states and the District of Columbia.
The details
Operators closed several prominent coal plants during this period, including the J.M. Stuart, Killen, and William H. Zimmer stations. Meanwhile, PJM Interconnection, which manages the grid, recently reported a 6,831-megawatt capacity shortfall for the 2028-29 period.
Timeline
In 2014, coal served as Ohio's primary electricity generation source.
The J.M. Stuart and Killen plants retired in 2018.
The William H. Zimmer plant officially retired in 2022.
Natural gas became Ohio's leading electricity generation source by 2024.
A PJM capacity auction for 2028-29 resulted in a shortfall in July 2026.
Market Landscape
Ohio's transition mirrors the broader shift across PJM Interconnection markets toward natural gas and renewable alternatives. This evolution places increased pressure on grid operators to secure sufficient capacity as regional demand projects toward 222,106 megawatts by 2036.
The shift in power sources and the capacity shortfall identified by PJM may influence future energy costs and grid reliability for Ohio residents. Customers can expect ongoing debates regarding the procurement of new energy resources to maintain consistent power supply.
The takeaway
The transition from coal to natural gas marks a fundamental change in how Ohio powers its homes and industries. While the change aligns with changing environmental standards, residents should monitor regional reports on grid capacity to understand potential impacts on energy stability.
Further reading
For more information on the regional power supply, visit the Utilities section.
Source note: This article includes information reported by Cleveland.
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