(Undated) -- A boil-water advisory is being lifted for four of the five South County water systems that were impacted by the discovery of E. coli bacteria in the water supply at the end of last month. The Rhode Island Department of Health says the Suez Water, Narragansett-Point Judith and the South Shore and Middlebridge systems in South Kingstown are all OK again after bacteria-free samples were taken for three straight days last week. Customers of the Narragansett-North End system are still being told to boil water until further notice.