Starting Sunday, recreationers will no longer have to take precautions before using the tidal portion of the Peconic River east of Grangebel Park, Suffolk health authorities announced Friday.

The county Department of Health Services issued the advisory Dec. 15, 2015 because of possible residual effects from inadequately treated wastewater discharged from the Riverhead sewage treatment plant.

Suffolk has funded substantial upgrades at the plant, improving the effluent that discharges into the Peconic, officials said. The effluent now meets the bacteriological limits established by the New York State Department of Environmental Conservation.

StoryCounty: LI river waters still unsafeStoryOfficials: Avoid water exposure at parts of river

Suffolk County health officials still advise bathers — no matter where they choose to swim — to avoid swallowing the water, particularly outside of public bathing beaches.

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“This reduces exposure to bacteria, parasites and other microorganisms that might make people sick by entering the body by swallowing, and through eyes, ears and nose,” the county said in its advisory.

The county also warns against swimming in cloudy or discolored water and advises bathers to wash their hands after water-related activities like swimming, fishing or boating.