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Legend (groundwater/SG_System)

Major Sand and Gravel Aquifers (2)
Mahomet Aquifer (3)
Glacial Drift Thickness (4)
no drift no drift
< 25 feet < 25 feet
25 - 50 feet 25 - 50 feet
50 - 100 feet 50 - 100 feet
100 - 200 feet 100 - 200 feet
200 - 300 feet 200 - 300 feet
300 - 400 feet 300 - 400 feet
400 - 500 feet 400 - 500 feet
> 500 feet > 500 feet