You should investigate the availability and quality of the water to the property. For information on wells and assured/adequate water, go to www.azwater.gov/dwr/Content/Find_by_Program/Wells/default.htm or www.azwater.gov/WaterManagement_2005/Content/OAAWS/default.asp.
Arizona is undertaking several General Stream Adjudications, which are court proceedings to determine the extent and priority of water rights in an entire river system. For information regarding water uses and watersheds affected by these adjudications, and the forms upon sale of the property, contact the Department of Water Resources at www.azwater.gov/dwr/Content/Find_by_Program/Adjudications/default.htm
Additionally, the Verde Valley Water Users assists members in matters pertaining to the Gila River System Adjudication. www.verdevalleywaterusers.org/homepage.htm