Does living near a high-voltage transmission line increase your child’s risk of leukemia? That’s a question researchers have been asking for over 50 years.
Here’s what more than forty studies found — including two 2021–2022 reviews that don’t agree with each other — plus a separate air-quality issue worth knowing about.
In 1979, a Denver researcher named Nancy Wertheimer wasn't looking for power lines at all. She was going door-to-door to the birth addresses of children who'd died of childhood cancer, looking for any environmental pattern, with no theory in mind. The wiring is what jumped out at her.
Since then, pooled analyses in 2000 and 2010 found a higher risk at the small fraction of homes with the highest magnetic field exposure. The two most recent large reviews disagree: a 2021 systematic review of 30 studies found that pattern held up, while a 2022 pooled analysis — funded by the electricity industry's own research institute — found no significant risk. Across the EU, an estimated 1.5–2% of childhood leukemia cases a year are attributed to this exposure.
In this video, Dr Nicole Bijlsma walks through what the research actually says, the household sources that can matter as much as the power line itself (fridges, meter boxes, ovens, electric blankets, even old plumbing), a separate air-quality question worth knowing about if the line runs near a busy road, and the one free step that tells you your real exposure instead of guessing from a map