Cyanos Activity September 5

Reconsider activities and limit exposure to the water.

Disclaimer: The information presented below reflects conditions throughout the lake and may differ from conditions on specific shorelines. For information regarding beach closings please contact the Torrington Area Health District or local town officials.

Water clarity at both Center Lake and North Bay declined only slightly to 2.0 meters at each station.  Water clarity was very uniform across the whole lake, with Secchi disk readings varying between 1.95 and 2.1 meters (14 stations).  Cyanobacteria numbers continued to increase with growth of about 50% at each station to reach 36K at Center Lake and 42K at North Bay.  Dissolved oxygen in surface water was between 8.4 mg/L and 9.4 mg/L, for saturation levels of between 98% and 110%.  Several stations (9) had supersaturated water at the surface suggesting that phytoplankton production was still high in those parts of the lake (mostly northern stations).  No anoxic water was detected at any station (14) with all stations having well oxygenated water to the bottom.  Lake surface water temperatures decreased slightly since the last visit.  Water temperatures should continue to steadily decline for the remained of the season.

Bantam Lake, CT 2017 Cyanobacteria Cell Count and CT DPH 2017 Recreational Waters Category Guidelines (Green = Safe, Yellow = Caution, Red = Posted Advisory)

Bantam Lake, CT 2017 Secchi Depth

Data is collected and analyzed by Northeast Aquatic Research, who is contracted by Bantam Lake Protective Association.