Ground-water 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 for specific projects, such as the Coastal Aquifers Salinity Project and the Water Conditions program, while other wells are measured so that staff can maintain long term records of ground-water levels for evaluation of trends.
Data accessible on this page are a subset of DGS holdings and are updated quarterly. This dataset contains summary data from wells having 100 or more water level observations or were in operation for 20 years or longer. A CSV file can be downloaded from this page, and the link below provides an interactive application to easily filter and sort the data as well as view hydrographs and a map of all wells.
For most of the wells water levels were measured in monitoring or observation wells by staff members of the DGS and USGS. For a few wells water levels were measured by employees of consulting firms. Users should be aware that these data records have been checked by DGS staff, however they are subject to revision. If you have questions or require additional information about the wells or measurements, please contact the DGS through the address at the bottom of this page.
University of Delaware
Delaware Geological Survey Building
Newark, DE 19716
Mon - Fri; 8:00am to 4:30pm