A European Union model used to predict the environmental exposure of a major detergent ingredient is overly conservative and “significantly overestimates” effluent concentrations, new research shows. A study co-authored by the American Cleaning Institute (ACI), “Comparing the European Union System for the Evaluation of Substances (EUSES) environmental exposure calculations with monitoring data for alkyl sulphate surfactants,” is now available in the journal Environmental Sciences Europe.