Which U.S. metro runs on the most nuclear electricity?

Charlotte–Concord–Gastonia (NC) tops the list, with roughly 39.9% of its grid coming from nuclear power, based on EPA eGRID 2023 subregion data.

What's the U.S. national nuclear share of electricity?

Nuclear provides about 19% of total U.S. electricity generation as of 2024 — the largest single source of zero-carbon power on the U.S. grid. Some regional grids run substantially higher because their subregion is dominated by states with large existing fleets (Illinois, South Carolina, Pennsylvania).

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Which U.S. metros run on the most nuclear power?

Charlotte–Concord–Gastonia tops the list at 39.9% nuclear-powered, followed by Washington–Arlington–Alexandria at 36.4% and Philadelphia–Camden–Wilmington at 36.4%. Across all 25 metros, nuclear provides 15.1% of grid electricity on average — close to the U.S. national share (~19%).

#	Metro	Nuclear %	Gas %	Coal %	Solar+Wind %
1	Charlotte–Concord–Gastonia(NC)	39.9%	39%	11%	7%
2	Washington–Arlington–Alexandria(DC)	36.4%	54%	5%	2%
3	Philadelphia–Camden–Wilmington(PA)	36.4%	54%	5%	2%
4	Baltimore–Columbia–Towson(MD)	36.4%	54%	5%	2%
5	Chicago–Naperville–Elgin(IL)	28.4%	38%	25%	6%
6	Boston–Cambridge–Newton(MA)	22.6%	56%	0%	7%
7	Atlanta–Sandy Springs–Roswell(GA)	20.4%	55%	15%	4%
8	Phoenix–Mesa–Chandler(AZ)	18.0%	49%	11%	16%
9	St. Louis(MO)	16.4%	17%	51%	14%
10	Miami–Fort Lauderdale–West Palm Beach(FL)	12.0%	76%	5%	5%
11	Tampa–St. Petersburg–Clearwater(FL)	12.0%	76%	5%	5%
12	Orlando–Kissimmee–Sanford(FL)	12.0%	76%	5%	5%
13	Detroit–Warren–Dearborn(MI)	10.2%	50%	26%	10%
14	Dallas–Fort Worth–Arlington(TX)	8.5%	50%	13%	29%
15	Houston–Pasadena–The Woodlands(TX)	8.5%	50%	13%	29%
16	San Antonio–New Braunfels(TX)	8.5%	50%	13%	29%
17	Austin–Round Rock–San Marcos(TX)	8.5%	50%	13%	29%
18	Los Angeles–Long Beach–Anaheim(CA)	8.0%	43%	2%	27%
19	Riverside–San Bernardino–Ontario(CA)	8.0%	43%	2%	27%
20	San Francisco–Oakland–Fremont(CA)	8.0%	43%	2%	27%
21	San Diego–Chula Vista–Carlsbad(CA)	8.0%	43%	2%	27%
22	Minneapolis–St. Paul–Bloomington(MN)	7.8%	13%	35%	39%
23	Seattle–Tacoma–Bellevue(WA)	3.1%	25%	16%	15%
24	New York–Newark–Jersey City(NY)	0.0%	98%	0%	0%
25	Denver–Aurora–Centennial(CO)	0.0%	26%	32%	31%

How we ranked these

Nuclear share is taken from EPA eGRID 2023 subregion data — the federal standard for grid emission-rate accounting. Each metro is mapped to its primary eGRID subregion. Metros that share a subregion (e.g. several MidContinent ISO metros) will have similar numbers, since the underlying grid is the same. See full methodology for the metro-to-subregion mapping.

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