Private water well serves the residents of an owner-occupied dwelling.
Semi-private water well serves fewer than 25 residents who do not own the supply, or own it collectively.
Non-community water well serves 25 or more non-residents at least 60 days per year.
Community water well is a public water system which serves at least 15 service connections used by residents or regularly serves at least 25 residents for a least 60 days per year. This type of well is regulated by the Illinois Environmental Protection Agency.
Abandoned well is a water well that is no longer used to supply water, or is in such a state of disrepair that has potential to contaminate the groundwater or otherwise threatens the public health and safety.
Closed Loop Well is a sealed watertight loop of pipe buried outside of a building foundation intended to re-circulate a liquid solution through a heat exchanger. The loop well can be drilled vertically or horizontally.