Fig. 3: The proportion of Anthropocene (since 1953), Holocene, and Pleistocene groundwater at the depth zone used for public supply in 21 Principal Aquifers in the continental United States. | Communications Earth & Environment

Fig. 3: The proportion of Anthropocene (since 1953), Holocene, and Pleistocene groundwater at the depth zone used for public supply in 21 Principal Aquifers in the continental United States.

From: Over a third of groundwater in USA public-supply aquifers is Anthropocene-age and susceptible to surface contamination

Fig. 3

Blue bars represent Anthropocene proportions, yellow bars represent Holocene proportions, and red bars represent Pleistocene proportions. The Principal Aquifers and their abbreviations are defined in Fig. 1.

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