UPDATE 6/16: Marshfield Green Harbor is reopened.

BOSTON (CBS/AP) — State environmental officials have reopened 7 of 9 South Shore beaches that were closed to swimmers after testing showed elevated bacteria counts in the water due to recent heavy rains.

Wollaston Beach in Quincy. (Photo by Carl Stevens)

A spokeswoman for the Department of Conservation and Recreation says the beaches in Quincy, Duxbury and Marshfield were all tested on Friday. All 7 Qunicy beaches were allowed to reopen after tests came back clean. Green Harbor in Marshfield and Residents Beach in Duxbury remain closed to swimming.

WBZ NewsRadio 1030′s Carl Stevens reports

In Duxbury, Residents Beach had 30 times the recommended level of bacteria according to a Save the Harbor/Save the Bay spokesman.

Beaches are tested on a regular basis during warm weather months to ensure the water is safe for swimming.

High levels of bacteria in the water are not uncommon after heavy rain.

More than an inch of rainfall was recorded in the past 10 days.

Bacteria in the water can cause upset stomachs, diarrhea, rashes, or earaches.

To see the water quality at your local beach, click here.

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