--- title: "Medieval teeth show Peak District lead mining was poisoning children by the 600s" url: https://badiyaa.com/medieval-teeth-peak-district-lead-mining-children/ published: 2026-10-14T11:03:00+01:00 modified: 2026-10-14T11:03:00+01:00 section: Science publisher: Badiyaa --- # Medieval teeth show Peak District lead mining was poisoning children by the 600s Enamel from 17 burials in Derbyshire averages up to 33.6 parts per million of lead, dating the restart of English lead smelting to the mid-seventh century. A woman buried at Wigber Low in Derbyshire in the 600s carried 69.1 parts per million of lead in her tooth enamel, locked in while she was a child. That single number, from a new study in the journal *Antiquity*, helps pin down when lead mining restarted in England’s Peak District after the Romans left: by the middle of the seventh century, roughly four centuries before the Domesday Book first recorded mines in the area. The paper, “Social dynamics of toxic metal industry in medieval Europe: Peak District lead production, AD 600–1500,” was published online on 13 October 2026 and is open access ([doi.org/10.15184/aqy.2026.10416](https://doi.org/10.15184/aqy.2026.10416)). Its lead author is Christopher Loveluck, professor of medieval European archaeology at the [University of Nottingham](https://www.nottingham.ac.uk/news/britains-largest-medieval-lead-industry-traced-through-ancient-teeth), with co-authors from Sheffield, York Archaeology, the local Castleton Historical Society and the British Geological Survey. ## Why teeth make a pollution archive Enamel does not remodel. Once a molar or premolar crown has formed, roughly between the ages of four and 12, its chemistry is fixed, so an adult skeleton still holds a record of what that person swallowed and breathed as a child. The team measured lead in enamel using inductively coupled plasma mass spectrometry at the British Geological Survey. Two other isotope tools answered a separate question: were these people locals? The team compared strontium and oxygen values with the British Geological Survey’s Biosphere Map, and both pointed to childhoods spent in the region, with little sign of incomers. A third tool, lead isotopes, can in principle match the metal to a particular ore field, because ratios differ with the underlying geology. Most individuals fell within the Peak District range, though one person from Wigber Low sat nearer the Yorkshire Pennines signature. The authors caution that British and continental ore fields overlap, which limits how far that method can be pushed. ## What the numbers show The researchers treat enamel lead below about 0.5 ppm as natural background and anything above roughly 0.6 to 0.7 ppm as a sign of human activity. Against that line, the medieval results are stark: - **Wigber Low** (about AD 625–685): average 24.9 ppm, from 2.0 to 69.1 - **Joule Yard, Castleton** (seventh to eleventh centuries): average 33.6 ppm, every individual above 25 - **Spital Field, Castleton** (late eleventh to early sixteenth centuries): average 33.6 ppm, from 25.2 to 68.4 A quick calculation puts that in proportion. Dividing the Castleton average of 33.6 ppm by the 0.5 ppm background ceiling gives a figure about 67 times higher than what local geology alone would explain. For comparison, an Iron Age adult from nearby Eldon Hole measured 0.66 ppm. The Nottingham team says children in these mining communities were exposed at levels matching or exceeding those of industrial British cities between about 1750 and 1850. Exposure peaked in the late 1100s and early 1200s, the same window in which lead pollution preserved in a Swiss ice core rises in step with Peak District output. ## Who paid the price People buried with high-status grave goods generally had much lower enamel lead, which the authors read as elites profiting from the industry while poorer households did the dirty processing. Three young women who died aged roughly 17 to 25 had high childhood exposure; the university describes any link to their early deaths as possible but complex, not proven. “There is no safe level of exposure,” said Anna Bloxam, co-director of the Castleton excavations. ## How strong is the evidence? The dating case is solid in one respect: radiocarbon-dated burials with enamel lead far above background are hard to explain without nearby smelting. But the sample is small, with five medieval individuals from each of three cemeteries plus two Iron Age comparisons, 17 people in all, from a single region. The social pattern rests on grave goods as a stand-in for status, and the health findings are associations, not diagnoses. The authors propose their figures as a benchmark for spotting other lead- and silver-producing communities, which is the obvious next test: the same enamel measurements applied to cemeteries near Wirksworth, where 9th-century Repton Abbey once owned mines, or in the Yorkshire Pennines. ## Further reading - [Antiquity paper: Social dynamics of toxic metal industry in medieval Europe (doi.org)](https://doi.org/10.15184/aqy.2026.10416) - [University of Nottingham: Britain's largest medieval lead industry traced through ancient teeth](https://www.nottingham.ac.uk/news/britains-largest-medieval-lead-industry-traced-through-ancient-teeth) - [Wikipedia: Derbyshire lead mining history](https://en.wikipedia.org/wiki/Derbyshire_lead_mining_history) - [British Geological Survey: New lead isoscape map for archaeological provenance studies](https://www.bgs.ac.uk/news/new-lead-isoscape-map-for-archaeological-provenance-studies-in-great-britain/) *Image: Derek Harper, CC BY-SA 2.0 via Wikimedia Commons* *This article was produced with AI assistance and reviewed by our Editorial Desk. [How we work](/editorial-policy/).*