Marblehead Beach Closed To Swimming For High Bacteria

MARBLEHEAD, MA — Marblehead's Grace Oliver Beach was one or more than three dozen beaches across the state declared off limits for swimming on Thursday after testing for a bacterial exceedence.

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"The beach has been posted, and we have taken new
samples with results coming back (Friday) afternoon," the Marblehead Board of Health said. "Once we have the new results, we will hopefully reopen the beach to
swimming."

Storm runoff from heavy rain is often a contributing factor to summer beach closures, with tests for high bacteria levels coming back 24 to 48 hours following a rain event.

The bacteria used as indicator organisms to test the waters at beaches are Enterococci and E. coli. Marine beaches are tested for the presence of Enterococci. Freshwater beaches are tested either for the presence of E. coli or Enterococci. Enteric bacteria are indicator organisms found in the intestines of warm-blooded animals and humans, often associated with fecal contamination.

An elevated presence of these organisms indicates the water may not be safe for human or animal consumption or contact, and may cause symptoms ranging from gastrointestinal pain to eye and ear discomfort to flu-like symptoms.

Most of these symptoms are minor, but occasionally a more serious illness may occur. Children, the elderly, and those with weakened immune systems are at greater risk of developing serious symptoms.

Some beach areas may remain open for recreational activities, though any contact with the water is strongly discouraged.