WOODBURY - Several Nassau County beaches are closed to swimmers today following Friday's heavy rainfall.

The Nassau County Department of Health says it closed 19 beaches to bathers on both the North and South shores as a precautionary measure.

The department says storm water runoff can have a negative impact by elevating bacterial levels and affecting water quality.

14 North Shore Beaches closed:
Centre Island Sound
Creek Club
Lattingtown Beach
Laurel Hollow Beach
Morgan Sound
North Hempstead Beach Park
Piping Rock Beach Club
Prybil Beach
Ransom Beach
Theodore Roosevelt Beach
Sea Cliff Village Beach
Soundside Beach
Stehli Beach
Tappen Beach

5 South Shore beaches closed:
Biltmore Beach Club
Hewlett Point Beach
Island Park Beach
Merrick Estates Civic Association
Philip Healey Beach

The county says that residents can call 516-227-9700 for the latest information on beach closings and openings.