Over many decades, scientists at PRI have invested vast human and financial resources to improve our scientific understanding of the complex Mahomet aquifer system. As a result, this aquifer is one of the most rigorously studied aquifers in the Midwest United States, which includes many historic geologic mapping and groundwater flow modeling projects. These studies by PRI scientists have included traditional methods such as exploratory drilling, ground-based geophysics and surface-mapping of soils. These data are key to our current understanding of the aquifer. However, the data are relatively sparse compared to data from regional studies of the aquifer, and therefore, the majority of the Mahomet aquifer remains largely unexplored and unknown. This airborne aquifer mapping project will not only significantly advance PRI’s ability to holistically image and characterize the aquifer at system-wide scales and depths, but it will also include the resolution needed for local understanding of the system.