Surface runoff is slow or medium. Permeability is moderate. In drained areas, depth to an intermittent apparent high water table is 0.5 foot to 2.0 feet from December to April in most years. Most areas are cropped to corn, soybeans, and small grain. Some areas are pastured or wooded.
Native vegetation is deciduous forest.
Extent is moderate, and mainly in MLRA 115. St. Clair County, Illinois, 1997. The Caseyville series was named for a town in St. Clair County, Illinois. Caseyville soils were formerly included with the Iva and Stronghurst series. Iva soils are considered to contain more illite clay minerals and less smectite clay minerals than Caseyville soils.