Seveso disaster at 50: how Italy’s dioxin catastrophe transformed chemical safety
By 
Jamie Durrani2026-06-29T08:33:00
On 10 July 1976, a chemical reactor near Milan released a cloud containing dioxin over residential areas. The Seveso disaster traumatised a community, sparked pan-European environmental campaigns and transformed industrial safety regulation across the continent.
50 years ago, a chemical explosion in northern Italy unleashed a toxic cloud that would become one of Europe’s worst industrial disasters. The Seveso accident left a community traumatised, sparked decades of scientific research into dioxin exposure, and transformed chemical safety regulation across the continent. As the anniversary approaches, we revisit the events of July 1976 and examine the disaster’s lasting impact on public health, industry and environmental politics.