To protect the public from nuclear accidents and terrorism, the American Thyroid Association (ATA) recommends that potassium iodide be stored in all homes within 50 miles of every nuclear reactor, and that the U.S. government make potassium iodide locally available to everyone within 200 miles of a nuclear reactor. View the ATA's full recommendations or enter your zip code to find nearby reactors. Outside the US? View all nuclear maps