- a) Groundwater that does not meet Section 620.210 (Class I), Section 620.230 (Class III), or Section 620.240 (Class IV); or
- b) Groundwater that is determined by the Board, under the procedures specified in Section 620.260, to be capable of agricultural, industrial, recreational, or other beneficial uses.
Except as provided in Section 620.250, General Resource Groundwater is as described in subsection (a) or (b):
(Source: Amended at 49 Ill. Reg. 4488, effective March 28, 2025)