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.

Mr. Powers said he recorded several bad water samples during the more than three week closure. Reopening of the pond was further delayed due to rain; water samples taken after a rain event cannot be used by the state to accurately determine the water quality.

According to the state Department of Public Health, enterococcus bacteria is an indicator organism that could signal the presence of harmful bacteria in the water. Swimming in water with high levels of enterococci can be dangerous for young children, the elderly and people with compromised immune systems.