WESTPORT — Stay out of the water.

Swimming and other recreational activities on the water are banned at local beaches for the next three days, town Health Director Mark Cooper said Monday.

That’s because of potential contamination in Long Island Sound from untreated sewage discharges in the aftermath of Tropical Storm Henri, he said.

The local advisory is based on advice from the state Department of Energy and Environmental Protection and the state Department of Public Health.

The state’s public-health guidance reads, in part, that people should avoid “direct contact with surface water in areas in close proximity to drainage pipes statewide, particularly in urban areas such as Bridgeport, Hartford, Norwalk, Norwich and the greater New Haven area over the next 72 hours in Connecticut’s streams and rivers. 

“Residents are advised not to swim, fish, or utilize paddle craft in these areas.”