The Groundwater Site Inventory (GWSI) database is the main ADWR repository for statewide groundwater data regarding wells and springs. The GWSI consists of field verified data collected by personnel from the ADWR Hydrology Division and/or the U.S. Geological Survey. This information is continually being updated by ongoing field investigations and through a statewide network of water level and water quality monitoring sites. GWSI consists of data tables containing spatial and geographical data, owner information, well construction and well log data, and historic groundwater data including water level, water quality, and well lift and pumpage records. You can acquire GWSI data by contacting the Bookstore at 602-771-8638 or you can order the entire database on CD through our online bookstore (requires Microsoft Access 2000 or XP).