Shellfish in parts of Cold Spring Harbor are once again safe to eat, following the accidental release of partially treated sewage last week from the Oyster Bay Sewer District, the state Department of Environmental Conservation announced Friday.

The temporary ban against harvesting will be lifted sunrise Saturday in waters off parts of Oyster Bay and Huntington towns, DEC officials said. Some water samples showed bacteria levels had dropped and other conditions had improved, making shellfish, which filter the water, safe to eat, officials said.

The reopened shellfishing areas lie east of Plum Point on Centre Island and Cove Point on Cove Neck, the agency said in a news release.

But the ban is still in effect for all of Oyster Bay Harbor west of Plum Point and Cove Point, officials said. Shellfish samples to be taken June 2 will determine when those waters will reopen, they said.

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State and Nassau County officials closed the waters and six North Shore beaches on May 23 after a malfunction at the wastewater treatment plant sent about 125,000 gallons of partially treated sewage and sludge into Oyster Bay Harbor. All beaches were reopened by Memorial Day.

A recorded message on temporary shellfish closures may be heard at 631-444-0480 or call the DEC marine resources office at 631-444-0492 or the DEC website for details.