The Wheaton area mainly consists of built-up areas and deep, gently rolling to nearly level, moderately well drained and poorly drained soils. These soils have a clay and silty subsoil formed in glacial till. The rich, dark topsoil from prairie origin, measures 3-18 inches in depth. DuPage County is blessed with large deposits of building materials and other natural resources. Stone, gravel, sand, and clay is produced by the mineral industry with about a third produced in crushed stone, a fifth in sand and gravel, a fifth in clay, and the rest in other mineral products.
Water is a major resource and is used from both surface and ground water sources.