Four beaches in Quincy and one in Hingham have been closed to swimming due to high levels of bacteria.

Belair Beach in Hingham was closed after the water tested at almost 11 times the maximum limit considered safe. The water was retested Thursday morning and results should be in Friday afternoon, The Patriot Ledger reported.

The Channing Street, Milton Street, Rice Road and Sachem Street beaches were all closed as a precaution, although the water tested within safe limits.

Hingham health officials said they can't be sure exactly what caused the elevated levels, but said retesting usually shows adequate results.

All other beaches on the South Shore are open.

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High bacteria levels close 5 beaches