Higher salt near drilling sites may trigger radium release into groundwater

Penn State researchers sampled 91 private water wells and springs in southwestern Pennsylvania to test whether nearby fracking operations affect radium levels. They observed elevated salinity near some drilling sites, which may liberate radium and heavy metals from rock into water. The authors note that other environmental factors could also explain the increases.

The study drew on samples from private wells and springs across Washington and Greene counties, two areas with extensive drilling history. Researchers measured radium alongside other metals and chemical indicators, finding that salinity spikes correlated with proximity to extraction sites. Radium's chemical resemblance to calcium means ingested radium can migrate to bone tissue, where radioactive decay may damage surrounding cells over time.

Pennsylvania's position as the second-largest U.S. gas producer—roughly one-fifth of national output in 2024—gives the findings regional weight. Unconventional drilling differs from conventional methods mainly in scale, using far more water to fracture rock horizontally over miles. The authors caution that salinity and radium increases could stem from other environmental variables, not solely energy extraction.