Explore radon data across Washington DC. Find county-level EPA zone classifications, user-submitted radon levels, certified testing and mitigation professionals, and resources to protect your home.
Washington DC, formerly known as the District of Columbia, is the capital of the United States. As per the US Constitution, the District is under jurisdiction of the US Congress and as such it is not considered a part of any state. It is the 24th most populous area in the country with a population that totaled 646,449 in 2013. It is also the 7th largest metropolitan area in the entire country.
DC does have an active radon program, dedicated to educating citizens about the risks associated with the deadly gas. You can find more information on Radon, testing and mitigation at the official page.
Explore radon data organized by metro region, including average levels, hotspot cities, and local mitigation professionals.
Browse radon data for individual cities across Washington DC. Each city page includes user-submitted radon levels, local contractors, and mitigation resources.