Potentiometric surface of the upper Floridan aquifer, Southwest Florida Water Management District, September 1984

A September 1984 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 1984 were higher than in May 1984. September levels averaged less than 1 foot higher than May levels in areas north of latitude 28 degrees 7 feet and about 6 feet higher in southern areas. Generally, water levels in September 1984 were lower when compared to September 1983. Water levels in most wells measured in September 1984 averaged less than 1 foot lower than September 1983 levels in the north and about 2.6 feet lower in the south. (USGS)