What type of aquifer is most common in the US?

Answer 1

The most common type of aquifer in the United States is the unconfined aquifer. Unconfined aquifers have a water table that is open to the atmosphere and can be recharged directly by precipitation. They are typically found in areas where the ground surface is permeable, allowing water to seep into the aquifer. This type of aquifer is significant for many regions due to its accessibility for groundwater extraction.