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Aquifers too deep to be tapped

David Zetland at Aguanomics points us to the way the US ‘too deep to use’ water aquifers for waste water from fracking, and the example of Mexico City drilling deep as a way to handle water shortages:

This article raises an interesting point: the US EPA allows companies to pollute aquifers that it assumes are too deep to be tapped for drinking. If rising water scarcity makes it economical to tap those aquifers (as Mexico just has), then it will not be possible to do so, since they will be polluted.

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