(415 ILCS 55/3) (from Ch. 111 1/2, par. 7453)
    Sec. 3. As used in this Act, unless the context clearly requires otherwise:
    (a) "Agency" means the Illinois Environmental Protection Agency.
    (b) "Aquifer" means saturated (with groundwater) soils and geologic materials which are sufficiently permeable to readily yield economically useful quantities of water to wells, springs, or streams under ordinary hydraulic gradients.
    (c) "Board" means the Illinois Pollution Control Board.
    (d) "Committee" means the Interagency Coordinating Committee on Groundwater as hereinafter created.
    (e) "Council" means the Groundwater Advisory Council.
    (f) "Department" means the Department of Natural Resources.
    (g) "Groundwater" means underground water which occurs within the saturated zone and geologic materials where the fluid pressure in the pore space is equal to or greater than atmospheric pressure.
    (h) "Potable" means generally fit for human consumption in accordance with accepted water supply principles and practices.
    (i) "Regulated recharge area" means a compact geographic area, as determined by the Board, the geology of which renders a potable resource groundwater particularly susceptible to contamination.
    (j) "Resource groundwater" means groundwater that is presently being or in the future capable of being put to beneficial use by reason of being of suitable quality.
    (k) "Underground water" means all water beneath the land surface.
(Source: P.A. 89-445, eff. 2-7-96.)