Most wells are multi-aquifer, tapping the upper and lower Brunswick aquifers and the Upper Floridan aquifer. The aquifer system is divided into the Upper and Lower Floridan aquifers. The Lower Floridan aquifer is not considered a major aquifer. Supplies water for kaolin mining and processing. Limestone and dolostone aquifers are most productive.
Storage is in regolith, primary openings, and secondary fractures and solution openings in rock.
Sinkholes may form in areas of intensive pumping. Storage is in regolith and fractures in rock. Hydrogeology of crystalline-rock aquifers is not well understood. Recharge varies in response to precipitation and surface-water infiltration into an aquifer. Discharge occurs as natural flow from an aquifer to streams and springs, as evapotranspiration, and as withdrawal from wells.