Answer: aquifers

AnswerCrossword Clue
AQUIFERSUnderground water sources
AQUIFERSSubsurface sources of water
AQUIFERSWater beds
aquifersAQUIFER, a water-bearing rock formation, also AQUAFER
aquifersany geological formation containing or conducting ground water, esp. one that supplies the water for wells, springs, etc.