Shellfishing will be banned in East Hampton Town's Three Mile Harbor from sunrise Saturday through Wednesday because of a fireworks show, the state Department of Environmental Conservation announced Thursday.

DEC closes the area annually because of the event, sponsored by the Clamshell Foundation, which attracts large numbers of boaters. Discharges from marine toilets could contaminate shellfish and pose a human health risk.

The fireworks show is set for Saturday night with a rain date scheduled for the following evening.

DEC expects to reopen the shellfishing areas by July 23.

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Three Mile Harbor is in a no discharge zone, which means boaters are required to use pump out facilities in the area of Peconic-Gardiners Bay. East Hampton Town Trustees operate a pump out boat and boaters can request the free service on marine radio VHF channel 73. The town harbormaster's office on Gann Road also has a free self-serve pump out facility.

A recorded telephone message reporting closures is available 24-hours a day at 631-444-0480.