The speed with which a well refills will depend on several factors. Factors including the well casing diameter, the depth of the aquifer, and the permeability of the surrounding soil and rocks. In general, deeper wells will take longer to refill than shallow ones. On average, a water well should refill anywhere within 45 mins to two hours. Additionally, damage to the casing or pump can impede water flow and result in a slower refill time. A minimum flow rate of 6 gallons per minute (GPM) is recommended for most domestic wells. Anything below 5 GPM can begin to impact refill time.