Suffolk County health officials Tuesday advised swimmers to stay out of the water at 25 beaches, most in the Town of Huntington, because of concerns about elevated bacteria levels.

The advisory is a precautionary measure for beaches in areas known to have substantial storm-water runoff caused by heavy rainfall, such as what occurred Monday night. The runoff can raise bacteria levels, which results in the waters failing to meet state standards for swimming, health officials said.

The department said the advisory against swimming will be lifted at 8:30 a.m. Wednesday unless water samples reveal elevated bacterial levels.

The advisory against swimming covers the following:

Smithtown: Callahans Beach

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Huntington:

  • Eagle Dock Community Beach
  • Cold Spring Harbor Beach Club Beach
  • West Neck Beach
  • Lloyd Neck Bath Club Beach
  • Lloyd Harbor Village Park Beach
  • Gold Star Battalion Park Beach
  • Head of the Bay Club Beach
  • Nathan Hale Beach Club Beach
  • Baycrest Association Beach
  • Bay Hills Beach Association
  • Crescent Beach
  • Knollwood Beach Association Beach
  • Fleets Cove Beach
  • Centerport Beach
  • Huntington Beach Community Association Beach
  • Centerport Yacht Club Beach
  • Steers Beach
  • Asharoken Beach
  • The two Hobart beaches in Northport and Eatons Neck
  • Crab Meadow Beach
  • Wincoma Association Beach
  • Valley Grove Beach
  • Prices Bend Beach