Maps of the Jasper and equivalent aquifers are the final maps in a series showing water levels in aquifers of Miocene age and younger in central and southern Louisiana, that were prepared as part of the Gulf Coast Regional Aquifer-System Analysis study. These maps show generalized contours of the altitude of water levels in wells completed in the Jasper aquifer in central and southwestern Louisiana and in aquifers in stratigraphically equivalent deposits of southeastern Louisiana for 1984. Separate maps were prepared for the upper and lower units of the Jasper and equivalent aquifers to provide a better representation of water levels. Although these maps provide a regional picture of water levels in the Jasper aquifer, they do not show the local differences in water levels between individual sand beds that occur near pumping centers. Generally, water levels shown at pumping centers are for the most heavily pumped sand beds at those centers. Most water level measurements used in compiling these maps were made in 1984. Where measurements from 1984 were unavailable, earlier and later measurements were used in areas where evidence indicated little change had occurred and in areas where definite regional trends of water level change could be established. In the areas where trends were established, water levels were adjusted to 1984 values by applying corrections based on the trends. Other maps in the series show water levels in aquifers of Pleistocene age, the Evangeline and equivalent aquifers, and the Catahoula aquifer. (Lantz-PTT)