Geohydrology of parts of Muhlenberg, Ohio, Butler, McLean, Todd, and Logan counties, Kentucky

Water-level, water-use, water-quality, and aquifer-yield data were collected during a well inventory in 1991 in part of western Kentucky. The data were overlaid on digital maps, using a Geographic Information System, to interpret the geohydrologic conditions within the study area. The discontinuous lithology of rocks in the area results in aquifers of limited areal extent in which local ground-water flow systems are developed; however, the regional ground-water flow generally is toward the broad alluvial areas along the Green and Rough Rivers. Fewer wells were in use in 1991 than in the 1960's when a similar well inventory was conducted; this decrease is probably due to expansion of service areas of several public water-supply systems. The quality of ground water is generally suitable for domestic use, except for a few wells that produce water with low pH and high concentrations of metals. The specific capacity of wells was found to range from 0.08 to 0.3 gallons per minute, per foot of draw- down. This range is somewhat less than values previously reported.