Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 920 - WATER WELL CONSTRUCTION CODE
Section 920.50 - Location
Current through Register Vol. 48, No. 12, March 22, 2024
a) General. In establishing the location of a well, the constructor shall consider sources of contamination that exist on or adjacent to the location of the well. As far as possible, the well shall be located on ground that is higher than sources of contamination and shall have ready access for repairs, maintenance, treatment and inspection. All water wells, except monitoring wells, shall be located in accordance with the minimum distances specified in Table C and shall be constructed in accordance with this Part.
b) Relation to Sources of Contamination. Determination of minimum lateral distances to locate a well from potential sources of contamination involves evaluation of the character and location of the sources of contamination, types of geologic formations present, depth to the aquifer, direction of groundwater flow, effect on the groundwater movement by well pumping, and possibilities of flooding of the site by surface waters. Based on practice and experience, accepted minimum lateral distances for some common sources of pollution with respect to a well are established in Table C. Other soil conditions or other sources of contamination shall be evaluated in each particular situation and a distance arrived at based on the pertinent facts. The Department may be called on for assistance in determining a proper distance.
c) Floodwater. Locations subject to flooding shall be avoided. If no reasonable alternate site exists, wells may be constructed in flood zones if special protective construction is included. The casing of the well shall terminate not less than 2 feet above the maximum known flood water elevation.
d) Relation to Building. With respect to buildings, pits and basements, the location of a well shall be as follows: