The Long Beach Island Health Department has reopened 13 miles of beach from Barnegat Light to Beach Haven after closing the stretch on Saturday when medical waste, trash and debris washed ashore.

Daniel Krupinski, a senior inspector at the health department, said that township employees worked on Saturday and early Sunday to clean the beaches. Krupinksi said the decision to reopen the beaches in six towns was made around 9:15 a.m. Sunday.

"The beaches are clean," Krupinski said. "The ocean is an ever-changing environment, and we're going to continue to monitor it."

The closed beaches included: Barnegat Light, Beach Haven, Surf City and Ship Bottom.

Authorities surmise that the debris may have come from the sewer overflow systems or from the inner shore lines of harbor areas in New York and New Jersey.

Contact Darran Simon at 856-779-3829 or dsimon@phillynews.com, or follow him on Twitter @darransimon.

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Jersey beaches reopen after debris cleanup