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Research Article

Hydraulic fracturing near domestic groundwater wells

Scott Jasechko and Debra Perrone
PNAS December 12, 2017 114 (50) 13138-13143; first published November 27, 2017; https://doi.org/10.1073/pnas.1701682114
Scott Jasechko
aBren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106;
bDepartment of Geography, University of Calgary, Calgary, AB T2N 1N4, Canada;
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  • For correspondence: jasechko@ucsb.edu
Debra Perrone
cDepartment of Environmental Studies, University of California, Santa Barbara, CA 93106;
dWater in the West, Stanford University, Stanford, CA 94305;
eCivil and Environmental Engineering, Stanford University, Stanford, CA 94305
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  1. Edited by Peter H. Gleick, Pacific Institute for Studies in Development, Environment, and Security, Oakland, CA, and approved October 18, 2017 (received for review January 31, 2017)

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Significance

Millions of Americans rely on self-supply groundwater wells for drinking water, but the number of these wells that are located near hydraulic fracturing operations is unknown. Here, we show that approximately half of all hydraulically fractured wells stimulated in 2014 exist within 2–3 km of one or more domestic (public and self-supply) groundwater wells. Our finding that many hydraulically fractured and domestic groundwater wells are colocated emphasizes that determining how frequently hydraulic fracturing activities impact groundwater quality is important to maintaining high-quality water in many domestic wells.

Abstract

Hydraulic fracturing operations are generating considerable discussion about their potential to contaminate aquifers tapped by domestic groundwater wells. Groundwater wells located closer to hydraulically fractured wells are more likely to be exposed to contaminants derived from on-site spills and well-bore failures, should they occur. Nevertheless, the proximity of hydraulic fracturing operations to domestic groundwater wells is unknown. Here, we analyze the distance between domestic groundwater wells (public and self-supply) constructed between 2000 and 2014 and hydraulically fractured wells stimulated in 2014 in 14 states. We show that 37% of all recorded hydraulically fractured wells stimulated during 2014 exist within 2 km of at least one recently constructed (2000–2014) domestic groundwater well. Furthermore, we identify 11 counties where most (>50%) recorded domestic groundwater wells exist within 2 km of one or more hydraulically fractured wells stimulated during 2014. Our findings suggest that understanding how frequently hydraulic fracturing operations impact groundwater quality is of widespread importance to drinking water safety in many areas where hydraulic fracturing is common. We also identify 236 counties where most recorded domestic groundwater wells exist within 2 km of one or more recorded oil and gas wells producing during 2014. Our analysis identifies hotspots where both conventional and unconventional oil and gas wells frequently exist near recorded domestic groundwater wells that may be targeted for further water-quality monitoring.

  • groundwater well
  • hydraulic fracturing
  • water quality
  • drinking water

Footnotes

  • ↵1S.J. and D.P. contributed equally to this work.

  • ↵2To whom correspondence should be addressed. Email: jasechko{at}ucsb.edu.
  • Author contributions: S.J. and D.P. designed research, performed research, analyzed data, and wrote the paper.

  • The authors declare no conflict of interest.

  • This article is a PNAS Direct Submission.

  • This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1701682114/-/DCSupplemental.

Published under the PNAS license.

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Hydraulic fracturing near domestic water wells
Scott Jasechko, Debra Perrone
Proceedings of the National Academy of Sciences Dec 2017, 114 (50) 13138-13143; DOI: 10.1073/pnas.1701682114

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Hydraulic fracturing near domestic water wells
Scott Jasechko, Debra Perrone
Proceedings of the National Academy of Sciences Dec 2017, 114 (50) 13138-13143; DOI: 10.1073/pnas.1701682114
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