In most regions of Warren County more than three-quarters of the drilled wells in uplands are adequate for a domestic supply. Yields as high as 50 gallons per minute have been reported from wells penetrating large solution channels. In the northwestern corner of the county, and in low-lying areas of the Barren River and its main tributaries, most wells are inadequate for domestic use, unless the well intercepts a major solution opening in the limestone; in this case the yield could be very large. Springs with flows ranging from a few gallons per minute to 2,000 gallons per minute are found in the county. Minimum flows generally occur in early fall, maximum flows in late winter.