How deep is a well categorized as a deep well?

A well is categorized as a deep well when its depth exceeds 100 feet. This classification is rooted in the nature of groundwater aquifers and the typical depths at which they can be reached. Deep wells tap into water-bearing formations that are located much further below the surface compared to shallow wells, which generally draw from aquifers that may be less than 50 feet deep.

The depth threshold of 100 feet indicates a transition point where the well may encounter different geological formations and water quality characteristics compared to shallower wells. As water is sourced from deeper aquifers, the likelihood of encountering more reliable and abundant water supplies increases, although it may also involve more complex drilling processes and higher costs. This depth also tends to ensure that the water supply is less susceptible to surface contamination and seasonal fluctuations.