BOSTON -

Three South Shore beaches have reopened after bacteria tests came back clean on Friday.

The Quincy Health Department gave Delano Beach, Orchard Beach and Rhoda Beach clean bills of health.

Other Quincy beaches remain closed.

The residents' beach in Duxbury was shut down on Thursday for the first time in nine years after tests for bacteria counts soared to 38 times the maximum recommended for swimming, our news partners The Patriot Ledger reported.

Delano Beach in Quincy was 60 times the limit, many times higher than its worst reading ever. Orchard and Rhoda beaches were slightly over the limit. Wollaston Beach was closed for the second time since testing began last month.

Although bacteria limits are within safe limits, swimming is prohibited as a precaution.

Urban beaches are often closed after significant rain because of contamination washing into the water.

The A Street beach on the ocean side of Hull was four times the limit.

Re-testing is in progress and results are expected sometime Friday.

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3 South Shore beaches reopen after bacteria testing