Duke Energy and county officials to test sirens around Catawba and McGuire nuclear stations

• Five- to 30-second quarterly test scheduled between 11 a.m. and 1 p.m. on Wednesday, April 9
• No public action required

 CHARLOTTE, N.C. – The outdoor warning sirens around the Catawba and McGuire nuclear stations will be tested between 11 a.m. and 1 p.m. on Wednesday, April 9, 2025.

The 89 sirens within 10 miles of Catawba Nuclear Station, located in York, S.C., and the 67 sirens within 10 miles of McGuire Nuclear Station, located in Huntersville, N.C., will sound for five to 30 seconds. To ensure they are functioning properly, it may be necessary to test some sirens more than once. Follow-up testing after siren maintenance may be required after 1 p.m.

Testing is performed in cooperation with emergency management officials in Catawba, Gaston, Iredell, Lincoln and Mecklenburg counties in North Carolina, and York County in South Carolina, who are responsible for sounding the sirens.

Because this is a test, local broadcasting stations will not interrupt regular programming to broadcast Emergency Alert System (EAS) messages. If there was ever a real emergency at either plant requiring the sirens to be sounded, local radio and television stations would broadcast information and instructions to the public.

For more information about the outdoor warning sirens, residents can refer to information available at duke-energy.com/NuclearEP.

Duke Energy Carolinas

Duke Energy Carolinas, a subsidiary of Duke Energy, owns 20,700 megawatts of energy capacity, supplying electricity to 2.9 million residential, commercial and industrial customers across a 24,000-square-mile service area in North Carolina and South Carolina.

Duke Energy

Duke Energy (NYSE: DUK), a Fortune 150 company headquartered in Charlotte, N.C., is one of America’s largest energy holding companies. The company’s electric utilities serve 8.4 million customers in North Carolina, South Carolina, Florida, Indiana, Ohio and Kentucky, and collectively own 54,800 megawatts of energy capacity. Its natural gas utilities serve 1.7 million customers in North Carolina, South Carolina, Tennessee, Ohio and Kentucky.

Duke Energy is executing an ambitious energy transition, keeping customer reliability and value at the forefront as it builds a smarter energy future. The company is investing in major electric grid upgrades and cleaner generation, including natural gas, nuclear, renewables and energy storage.

More information is available at duke-energy.com and the Duke Energy News Center. Follow Duke Energy on X, LinkedIn, Instagram and Facebook, and visit illumination for stories about the people and innovations powering our energy transition.

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