Hazardous waste sites are locations where dangerous materials, such as chemicals or heavy metals, have been improperly disposed of or released into the environment. These sites can pose serious health risks to nearby communities and ecosystems. Common sources of hazardous waste include industrial facilities, landfills, and abandoned factories. To manage these sites, government agencies often conduct assessments and clean-up operations. The Environmental Protection Agency (EPA) in the United States plays a key role in identifying and regulating hazardous waste sites through programs like the Superfund program, which aims to clean up the most contaminated areas.