Protecting the RI Shorelines with Clivus Composting Waste Treatment Systems Over the years the State of Rhode Island has identified areas that it deems critical resource areas, regions that are particularly sensitive to the detrimental effects of nutrients such as nitrogen, pathogenic organisms, organic chemicals and other substances that may be present in effluent from onsite wastewater treatment systems.  These regions are groundwater recharge zones that include salt ponds and drinking supply watersheds. With the