Uncle Seth’s Pond in West Tisbury has been closed to swimmers, the town selectmen confirmed on Wednesday. The likely cause is bacterial contamination, selectman Kent Healy said.

Seth’s Pond in West Tisbury has been reopened, health agent John powers announced Thursday.

The popular freshwater swimming pond was closed July 9 after water samples revealed high levels of enteroccocus bacteria.

The pond was also briefly closed in June due to bacteria.

Seth’s Pond in West Tisbury has been closed until further notice due to high levels of bacteria, health agent John Powers announced Tuesday.

The freshwater pond was re-tested today, Mr. Powers said; it will be reopened pending the return of clean water samples.

This is the second time the popular swimming pond off Lambert’s Cove Road has been closed this season. In June the pond was briefly closed when a water sample showed high levels of enterococcus bacteria.

It’s safe to go back in the water again. That was the word on Seth’s Pond from the West Tisbury health agent John Powers Thursday afternoon, one day after the freshwater pond was closed for swimming.

It’s safe to swim in the water — again. That was the word on Seth’s Pond from West Tisbury health agent John Powers Thursday morning, only one day after the freshwater pond had been closed for swimming.

The popular swimming pond off Lambert’s Cove Road has been closed for most of the summer due to high levels of enterococci bacteria, organisms that may indicate the presence of fecal coliform bacteria. Seth’s Pond closed three times throughout June, then again for six weeks in July and August.

Lambert’s Cove Beach, Seth’s Pond, Long Cove Pond and Tisbury Great Pond were all closed to swimming on Thursday after results from routine water testing revealed a spike in the bacteria enterococcus.

West Tisbury health agent John Powers said he expects the tests to be an anomaly and anticipated the beaches would be open again by today. He said the contamination at Lambert’s Cove may be in part due to a breach at James Pond.

Seth’s Pond is closed to swimming due to high bacteria counts in Monday’s routine sampling results, West Tisbury board of health agent John Powers said Wednesday morning.

Signs are posted to warn bathers of the bacteria.

The announcement follows a series of inexplicable readings and beach closures around the Vineyard. Inkwell, Lambert’s Cove and other beaches also were closed temporarily in recent weeks, in the height of the summer tourist season.