This table contains summary data from wells having 100 or more groundwater level observations and, with a little editing, is suitable for use in GIS software. Groundwater levels are basic information needed for evaluating water conditions and for basic and applied research. For these efforts, water levels are being measured statewide in wells completed in multiple aquifers. Some wells are measured by DGS staff for specific long-term programs, such as the Delaware Groundwater Monitoring Network and the Water Conditions programs, while other wells are measured for specific short-term projects by DGS staff, consulting firms, and well owners. All data are reviewed by DGS staff prior to posting but are subject to change.