The swim area at Kettletown State Park in Southbury will not reopen this season.  The beach was closed August 3rd when blue-green algae was found.  The bloom worsened throughout the month.  Blue-green aglae can produce a toxin harmful to people and pets if ingested. It can cause kidney problems and skin irritation.  The state Department of Energy and Environmental Protection issued the agency's final water quality report of the season yesterday. This is the second year that Kettletown closed to swimming in August and didn’t reopen before Labor Day.