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Level III Ecoregions of Illinois

Revised April 2000
National Health and Environmental Effects Research Laboratory
U.S. Environmental Protection Agency

level III ecoregions of Illinois region 52   52. Driftless Area
region 53   53. Southeastern Wisconsin Till Plains
region 54   54. Central Corn Belt Plains
region 72   72. Interior River Lowland
region 73   73. Mississippi Alluvia Plain