What is a shallow well defined as?

A shallow well is defined as being above an impervious layer and typically less than 100 feet deep. This definition is important because shallow wells draw water from aquifers that are more susceptible to contamination and other environmental influences, due to their proximity to the surface. The distinction being above an impervious layer indicates that the water source is situated in a way that may allow for quicker recharge but also increased risk of pollutants entering the groundwater.

The specified depth of less than 100 feet reinforces the concept that shallow wells target water that is more accessible and often more vulnerable than deeper wells, which tap into confined aquifers. Understanding this definition is critical for groundwater management and protection strategies, as it assists in evaluating the potential risks associated with water quality in shallow wells compared to deeper sources.