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Principal aquifers and wells assessed in nationwide NAWQA/GAMA groundwater quality study

By California Water Science Center
Map of the US shaded by principal aquifer. Wells that were sampled are symbolized with circles
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Map showing principal aquifers (PAs) and wells that were sampled as part of a Nationwide assessment of the quality of groundwater used for public supply.  

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Belitz, K., Fram, M. S., Lindsey, B. D., Stackelberg, P. E., Bexfield, L. M., Johnson, T. D., Jurgens, B. C., Kingsbury, J. A., McMahon, P. B., & Dubrovsky, N. M. (2022). Quality of groundwater used for public supply in the Continental United States: A comprehensive assessment. ACS ES&T Water. https://doi.org/10.1021/acsestwater.2c00390

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Quality of groundwater used for public supply in the continental United States: A comprehensive assessment

The presence of contaminants in a source water can constrain its suitability for drinking. The quality of groundwater used for public supply was assessed in 25 principal aquifers (PAs) that account for 84% of groundwater pumped for public supply in the U.S. (89.6 million people on a proportional basis). Each PA was sampled across its lateral extent using an equal-area grid, typically with 60 wells

By
Water Resources Mission Area, California Water Science Center, Colorado Water Science Center, New Mexico Water Science Center

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