Wastewater treatments are important for reducing human exposure to norovirus. A study in England looked at norovirus levels in untreated sewage and treated wastewater from different treatment plants. They found that activated sludge treatment was the most effective at removing norovirus. Monitoring norovirus in sewage could help predict outbreaks and prevent them. Removing stormwater discharges and improving treatment processes can reduce the risk of norovirus spreading in the environment.