Uncle Seth’s Pond in West Tisbury closed to swimming

Seth's Pond, a popular swimming spot as shown in this photo taken last summer, is closed to swimming once again. — File photo by Ralph Stewart

Uncle Seth’s Pond off Lambert’s Cove Road was closed to swimming Tuesday because of high bacteria counts.

“Seth’s pond is closed due to high bacteria counts from Monday’s sample,” West Tisbury health agent John Powers said in an email on Tuesday. “The pond was retested this afternoon.”

It is the second time this season. On June 18, water samples showed more than the allowable limit of enterococci bacteria, which indicate the possible presence of disease-causing bacteria, or pathogens, in the water, and the pond was closed. It was retested and reopened two days later.

Under Massachusetts Board of Environmental Health (BEH) regulations, the pond must remain closed to swimmers until it meets both the daily standard for clean water and a formula which considers the five most recent water tests. Heavy rainfall is sometimes responsible for elevated levels.