Warren County had an estimated population of 83,215 in 1999 with 98 percent on public water. The estimated population in 2008 was 105,862 with 97 percent on public water.
The Water Resource Development Commission has prepared a report on water-supply infrastructure in the county.
It is estimated that there are over 200,000 water wells in Kentucky. The Kentucky Groundwater Data Repository, maintained by the Kentucky Geological Survey, has information on over 50,000 of these wells. The locations of wells and springs in the county for which data are available is shown on the map of wells and springs in the county. Certified well drillers in Kentucky.