Please note that the interactive D.C. soil map on DCAR’s website is temporarily disabled. We are currently working with D.C. government officials to remedy the situation. In the meantime, please use the Library of Congress, which has a high-definition map of the 11 soil types that must be included in contract addendums.  Due to the legal implications involved with these disclosures, GCAAR/DCAR staff cannot advise members on their property’s soil type.  If you have any further questions, please contact Evan Loukadakis at