Hydrologic data were collected in Snyderville Basin, Park City, and adjacent areas, Summit County, Utah, from 1993 to 1995 to better understand the hydrologic system. Data from earlier years also are presented. Data collected from wells include well-completion data, lithology, waterlevel measurements, and physical properties of the water. Data collected from springs and surfacewater sites include discharge and physical properties of the water. Water samples collected from ground- and surface-water sites were analyzed for isotopes and chlorofluorocarbons.