The Floridan aquifer system, composed of the Upper and Lower Floridan aquifers, is a thick sequence of Paleogene carbonate rock which spans an area of about in the southeastern United States, it underlies parts of which  state in the southern region of the United States, with part of its southern border formed by the Gulf of Mexico, and its western border is formed by the Mississippi River?
Floridan aquifer The Floridan aquifer system, composed of the Upper and Lower Floridan aquifers, is a thick sequence of Paleogene carbonate rock which spans an area of about in the southeastern United States. It underlies the entire state of Florida and parts of Alabama, Georgia, Mississippi, and South Carolina.
Central Florida Central Florida is a region of the U.S. state of Florida. Different sources give different definitions for the region, but as its name implies it is usually said to comprise the central part of the state, including the Tampa Bay and Orlando area. It is one of Florida's three directional regions, along with North Florida and South Florida. It includes the following counties: Brevard, Citrus, Hardee, Hernando, Hillsborough, Indian River, Lake, Manatee, Marion, Orange, Osceola, Pasco, Pinellas, Polk, Seminole, Sumter, and Volusia.