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You searched for: Author Geological Survey (U.S.). Water Resources Division. Wisconsin District Remove constraint Author: Geological Survey (U.S.). Water Resources Division. Wisconsin District Subject Groundwater Remove constraint Subject: Groundwater Data type Polygon Remove constraint Data type: Polygon
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1. Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands

2003. Geological Survey (U.S.). Water Resources Division. Wisconsin District. This polygon shapefile contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islan... Geological Survey (U.S.).