ABSTRACT: Duval County, as well as most of Florida, is experiencing extensive population growth. Abundant and well-managed water resources are fundamental to nurture and maintain a dynamic population. Over the years, water scientists and administrators have studied and managed the water resources of Duval County and have gained much knowledge about hydrologic conditions. Most of this information, however, is highly technical and not always readily available to the public. The City of Jacksonville, recognizing the need for a better understanding of water resources by the general public, entered into a cooperative program with the U.S. Geological Survey to prepare a report that would describe the hydrology of Duval County in a nontechnical style.