A nonprofit conservation group is accusing federal appraisers of ignoring water concerns in southern Arizona, leading to overvalued properties. The Tucson-based Center for Biological Diversity said it received documents via the Freedom of Information Act showing that U.S. Department of Housing and Urban Development (HUD) and Federal Housing Administration (FHA) appraisers are not including environmental water scarcity factors in their reports for homes in Sierra Vista and Fort Huachuca. … He [Center for Biological Diversity co-founder Robin Silver] fears ignoring environmental water concerns in the area could lead to a housing crash.