An abandoned well is defined as a water or monitoring well which is no longer used to supply water, or is in such a state of disrepair that the well or boring has the potential for transmitting contaminants into an aquifer or otherwise threatens the public health or safety.
A water well that is no longer used and not properly maintained can serve as a route for surface water run-off to contaminate the aquifer and hence cause pollution of your own and other wells in the area.
The basic concept in sealing an abandoned well is restoring the geological conditions that existed before the well was drilled. Simply filling up an unused well with sand, gravel, stones, debris, or garbage is not appropriate. The particular method for sealing a well depends on the type of water well and the geological features.
Contact the Macon County Health Department or a licensed professional water well contractor for information and procedures to properly seal an abandoned well.