A Superfund site is a location in the United States that has been contaminated by hazardous waste and is eligible for cleanup under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). These sites are identified by the Environmental Protection Agency (EPA) due to the potential risks they pose to human health and the environment. The Superfund program aims to clean up these contaminated areas, often involving complex processes to remove or contain hazardous substances. The cleanup efforts are funded by responsible parties or, if they cannot be identified, by federal funds. The goal is to restore the site for safe use and protect surrounding communities.