Observation Dates: Thru 9/05/2021
% Zones Monitored: 71%
Suspicious Blooms:  9
Confirmed Blooms:  12

The blooms are now in full swing. Just as in previous years, Labor Day weekend saw a spike in bloom activity. Prior to September 4th, most blooms were very scattered and light, making it hard to tell whether they were a bloom from photographs. Starting on the fourth, that was not a problem any more. Blooms were widespread, all toward the southern end of the lake. Mostly along the eastern shoreline from about Sampson State Park and south. On the fourth there were 14 reports and 9 confirmed blooms.

Last year a similar first big day happened on August 31st, but then, unlike other years, we didn’t have many blooms the rest of September. In most years, we see cycles with a day or two of extensive blooms with a respite between.

Check the Pure Waters HAB website (www.senecalake.org/Blooms) for the latest information.