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

Jonathan Crowe blogs about maps at The Map Room. His nonfiction has been published by AE, The New York Review of Science Fiction, the Ottawa Citizen and Tor.com. His sf fanzine, Ecdysis, was a two-time Aurora Award finalist.