The Web site offers a comprehensive assessment of estuarine health in southeastern Australia -- a joint project of Museum Victoria and the Australian Museum. The project aimed to 1) evaluate whether predictive computer models currently used to monitor river health can be developed for Australian estuaries; 2) evaluate the abundance-biomass comparison method; 3) collect new data to support the estuarine health assessment model; and 4) develop a standard protocol for estuarine health assessment using benthic macrofauna. Project methods and results, as well as a detailed general overview of the estuarine ecosystem and benthic macrofauna, are available to any reader and may of particular interest to those in environmental monitoring as potential research models.