a) Except as otherwise provided in this Section, no well site may be located as follows (Section 1-25(a) of the Act):

1. 1) within 500 feet measured horizontally from any residence or place of worship unless the landowner of the residence or the governing body of the place of worship otherwise expressly agrees in writing to a closer well site location (Section 1-25(a)(1) of the Act). This agreement shall be signed and dated by the landowner of the residence or an authorized representative of the governing body of the place of worship. A copy of the agreement shall be submitted to the Department as part of the permit application;
2. 2) within 500 feet measured horizontally from the edge of the property line from any school, hospital, or licensed nursing home facility (Section 1-25(a)(2) of the Act);
3. 3) within 500 feet measured horizontally from the surface location of any existing water well or developed spring used for human or domestic animal consumption, unless the landowner or landowners of the well or developed spring otherwise expressly agrees or agree in writing to a closer well site location (Section 1-25(a)(3) of the Act). This agreement shall be signed and dated by the landowner. A copy of the agreement shall be submitted to the Department as part of the permit application;
4. 4) within 300 feet measured horizontally from the center of a perennial stream or from the ordinary high water mark of any river, natural or artificial lake, pond, or reservoir (Section 1-25(a)(4) of the Act), unless the landowner of a water source that is wholly contained within the landowner's property expressly, in writing, waives the setback requirements and agrees to a closer well site location (Section 1-25(b) of the Act). This agreement shall be signed and dated by the landowner. A copy of the agreement shall be submitted to the Department as part of the permit application.
5. 5) within 750 feet of a nature preserve or a site on the Register of Land and Water Reserves (Section 1-25(a)(5) of the Act); or

6. 6) within 1,500 feet of a surface water or groundwater intake of a public water supply; the distance from the public water supply as identified by the Department shall be measured as follows (Section 1-25(a)(6) of the Act):

   1. A) For a surface water intake on a lake or reservoir, the distance shall be measured from the intake point on the lake or reservoir (Section 1-25(a)(6)(A) of the Act).
   2. B) For a surface water intake on a flowing stream, the distance shall be measured from a semicircular radius extending upstream of the surface water intake (Section 1-25(a)(6)(B) of the Act).
   3. C) For a groundwater source, the distance shall be measured from the surface location of the groundwater wellhead or the ordinary high water mark of the spring. The distance restrictions under this subsection (a) shall be determined as conditions exist at the time of the submission of the permit application pursuant to Section 245.210 (Section 1-25(a)(6)(C) of the Act).