In the northwestern edge of Breckinridge County, nearly all drilled wells in the Ohio River alluvium are adequate for domestic use; many wells yield several hundred gallons per minute. Compound horizontal wells set in the alluvium may yield 5,000 gallons per minute, enough for a community or industrial supply. In the northern third of the county (the central highlands and southeastern edge of Breckinridge County), most drilled wells are adequate for a domestic supply. Yields as high as 100 gallons per minute have been reported from wells penetrating fault zones. Depths of adequate wells range from 100 to 300 feet. In the remaining areas of the county, only a few wells yield enough water for a domestic supply, except that in the lowland areas bordering streams, some wells may be adequate.