Enteric viruses from sewage overflows into water catchments threaten public health through food production and recreational activities. Despite wastewater treatment and water quality monitoring, viral contamination of food still occurs in Europe, impacting consumers health and food producers economically. Shellfish filter large amounts of water, making norovirus contamination a major cause of foodborne outbreaks. While rainfall plays a role, the impact of extreme weather events remains unclear. This project aims to ensure safe and sustainable water use, particularly in shellfish production, by improving understanding of viral contamination and developing an early-warning tool to mitigate risks during extreme hydroclimatic events.