SWAT Environmental of Washington DC, is one of the best choices for radon mitigation DC. Offering radon reduction and radon mitigation services in all Washington DC counties. We have not always been such a large company, and actually started from very humble beginnings, beginning in 1988 with only one radon specialist serving the real estate market. Since then we have experienced tremendous growth over the past ten years! As we continue to grow we strive to keep our quality of work to the same standard and focus on serving our customers in our local markets including the state of Washington DC.