Frost line depth in Effingham County, IL

How deep the ground freezes in Effingham County, IL

22 in. Dig to 23 in, just below the frost. Nearest NOAA station: Effingham 3sw, 5.1 mi.

Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.

Code depth · Snow