This graph shows the summer capacity margin in the United States in 2012, by NERC regional entity. The Western Energy Coordinating Council's (WECC) summer capacity margin was around 12 percent that year.
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U.S. electricity summer capacity margin* by NERC margin in 2012
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* According to the source, capacity margin is the amount of unused available capability of an electric power system at peak load as a percentage of capacity resources.
The abbreviation NERC stands for North American Electric Reliability Corporation.
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EIA. (December 12, 2013). U.S. electricity summer capacity margin* by NERC margin in 2012 [Graph]. In Statista. Retrieved June 05, 2025, from https://www.statista.com/statistics/186314/us-electricity-summer-capacity-margin-by-nerc-region/
EIA. "U.S. electricity summer capacity margin* by NERC margin in 2012." Chart. December 12, 2013. Statista. Accessed June 05, 2025. https://www.statista.com/statistics/186314/us-electricity-summer-capacity-margin-by-nerc-region/
EIA. (2013). U.S. electricity summer capacity margin* by NERC margin in 2012. Statista. Statista Inc.. Accessed: June 05, 2025. https://www.statista.com/statistics/186314/us-electricity-summer-capacity-margin-by-nerc-region/
EIA. "U.S. Electricity Summer Capacity Margin* by Nerc Margin in 2012." Statista, Statista Inc., 12 Dec 2013, https://www.statista.com/statistics/186314/us-electricity-summer-capacity-margin-by-nerc-region/
EIA, U.S. electricity summer capacity margin* by NERC margin in 2012 Statista, https://www.statista.com/statistics/186314/us-electricity-summer-capacity-margin-by-nerc-region/ (last visited June 05, 2025)
U.S. electricity summer capacity margin* by NERC margin in 2012 [Graph], EIA, December 12, 2013. [Online]. Available: https://www.statista.com/statistics/186314/us-electricity-summer-capacity-margin-by-nerc-region/
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