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Research Article

Lead in ancient Rome’s city waters

Hugo Delile, Janne Blichert-Toft, Jean-Philippe Goiran, Simon Keay, and Francis Albarède
PNAS first published April 21, 2014; https://doi.org/10.1073/pnas.1400097111
Hugo Delile
aUniversité Lumière Lyon 2, Centre National de la Recherche Scientifique-Unité Mixte de Recherche (CNRS UMR) 5600, 69676 Bron, France;
bEcole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5276, 69007 Lyon, France;
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  • For correspondence: hdelile@gmail.com
Janne Blichert-Toft
bEcole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5276, 69007 Lyon, France;
cDepartment of Earth Science, Rice University, Houston, TX 77005;
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Jean-Philippe Goiran
dMaison de l’Orient et de la Méditerranée, CNRS UMR 5133, 69365 Lyon Cedex 7, France; and
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Simon Keay
eArcheology, Faculty of Humanities, University of Southampton, Southampton SO17 1BF, Great Britain
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Francis Albarède
bEcole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5276, 69007 Lyon, France;
cDepartment of Earth Science, Rice University, Houston, TX 77005;
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  1. Edited by Thure E. Cerling, University of Utah, Salt Lake City, UT, and approved March 19, 2014 (received for review January 3, 2014)

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Significance

Thirty years ago, Jerome Nriagu argued in a milestone paper that Roman civilization collapsed as a result of lead poisoning. Clair Patterson, the scientist who convinced governments to ban lead from gasoline, enthusiastically endorsed this idea, which nevertheless triggered a volley of publications aimed at refuting it. Although today lead is no longer seen as the prime culprit of Rome’s demise, its status in the system of water distribution by lead pipes (fistulæ) still stands as a major public health issue. By measuring Pb isotope compositions of sediments from the Tiber River and the Trajanic Harbor, the present work shows that “tap water” from ancient Rome had 100 times more lead than local spring waters.

Abstract

It is now universally accepted that utilization of lead for domestic purposes and water distribution presents a major health hazard. The ancient Roman world was unaware of these risks. How far the gigantic network of lead pipes used in ancient Rome compromised public health in the city is unknown. Lead isotopes in sediments from the harbor of Imperial Rome register the presence of a strong anthropogenic component during the beginning of the Common Era and the Early Middle Ages. They demonstrate that the lead pipes of the water distribution system increased Pb contents in drinking water of the capital city by up to two orders of magnitude over the natural background. The Pb isotope record shows that the discontinuities in the pollution of the Tiber by lead are intimately entwined with the major issues affecting Late Antique Rome and its water distribution system.

  • harbor geoarcheology
  • paleopollution
  • Late Holocene
  • ore provenance
  • sedimentology

Footnotes

  • ↵1To whom correspondence should be addressed. E-mail: hdelile{at}gmail.com.
  • Author contributions: H.D., J.B.-T., J.-P.G., S.K., and F.A. designed research; H.D., J.B.-T., and J.-P.G. performed research; J.B.-T. contributed new reagents/analytic tools; H.D. and F.A. analyzed data; and H.D., J.B.-T., and F.A. 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.1400097111/-/DCSupplemental.

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Lead in ancient Rome’s city waters
Hugo Delile, Janne Blichert-Toft, Jean-Philippe Goiran, Simon Keay, Francis Albarède
Proceedings of the National Academy of Sciences Apr 2014, 201400097; DOI: 10.1073/pnas.1400097111

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Lead in ancient Rome’s city waters
Hugo Delile, Janne Blichert-Toft, Jean-Philippe Goiran, Simon Keay, Francis Albarède
Proceedings of the National Academy of Sciences Apr 2014, 201400097; DOI: 10.1073/pnas.1400097111
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