Explore the IGS Interactive Maps Below

County scale surficial and bedrock map pdf's and shapefile downloads for all available counties.

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7.5' Quadrangle scale surficial and bedrock map pdf's and shapefile downloads for all available quadrangles.

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Water for drinking, agriculture, and industry in Iowa largely comes from various aquifers within the state. The aquifer mapping application allows users to click any location in Iowa and view the bedrock aquifers available in that area. Additional information about each aquifer can also be accessed through the application.

Learning more about the features of Iowa’s landscape increases our understanding and appreciation of the views around us and the ground beneath our feet. - Jean C. Prior