The Principal Aquifers of the United States

usa-aquifer

It’s an older map, but one I hadn’t seen before: the USGS’s map of the principal aquifers of the United States. [Christopher Tucker]

Previously: Global Groundwater Map.

Author: Jonathan Crowe

I blog about maps at The Map Room, review books for AE: The Canadian Science Fiction Review, and edit a fanzine called Ecdysis.