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Abstract
This study computes the aquifer-scale cumulative distribution function to characterize the age distribution for 21 Principal Aquifers that account for ~80% of public-supply pumping in the United States. The results show that nationally, 38% of groundwater is Anthropocene (since 1953), 34% Holocene (75–11,800 years ago), and 28% Pleistocene (>11,800 years ago). The Anthropocene fraction varies widely across aquifers, indicating differing susceptibilities to land-surface contamination. Aquifer type and climate significantly influence groundwater age.
Publisher
Communications Earth & Environment
Published On
Jul 01, 2022
Authors
Bryant C. Jurgens, Kirsten Faulkner, Peter B. McMahon, Andrew G. Hunt, Gerolamo Casile, Megan B. Young, Kenneth Belitz
Tags
groundwater
age distribution
aquifers
Anthropocene
Holocene
Pleistocene
contamination

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