Potentiometric surface of the Floridan Aquifer, Southwest Florida Water Management District, September 1982

A September 1982 potentiometric surface map of the Southwest Florida Water Management District depicts the annual high water-level period. Water levels in most wells measured in September 1982 were higher than in May 1982. Levels averaged about 12 feet higher in the southern part of the area and about 5 feet higher in the north. In agricultural areas of southeastern Hillsborough, Manatee, southwestern Polk, Hardee, northwestern De Soto, and northern Sarasota Counties, water-level increases ranged from 1 to 27 feet. From September 1981 to September 1982, water-level changes ranged from slight decreases in some parts of the study area to 1- to 22-foot increases in the major part of the study area. (USGS)