Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 620 - GROUNDWATER QUALITY
Subpart B - GROUNDWATER CLASSIFICATION
- Section 620.201 - Groundwater Designations
- Section 620.210 - Class I: Potable Resource Groundwater
- Section 620.220 - Class II: General Resource Groundwater
- Section 620.230 - Class III: Special Resource Groundwater
- Section 620.240 - Class IV: Other Groundwater
- Section 620.250 - Groundwater Management Zone
- Section 620.260 - Reclassification of Groundwater by Adjusted Standard
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