Residents of a small community on the shore of Shuswap Lake have been advised to boil their water before use. The Columbia-Shuswap Regional District issued the boil-water notice for users of the Sorrento Water System on Friday evening, citing elevated turbidity in the water. The water system serves properties in the unincorporated community of Sorrento, about 25 kilometres west of Salmon Arm and 75 kilometres east of Kamloops along the Trans-Canada Highway.