06/03/2026
The water is talking. Are we listening?
The South Carolina Department of Environmental Services has issued a Harmful Algal Bloom (HAB) Recreational Watch for portions of Lake Hartwell after confirming the presence of a cyanobacteria bloom in several areas of the lake. Reports describe bright green and blue-green patches that resemble spilled paint or streaks of yellow across the water's surface.
While current cyanotoxin levels remain below state recreational criteria, these blooms can change quickly. If you spot a suspicious bloom, avoid contact with the water, keep pets and livestock away, do not swim or fish in the affected area, and report the sighting to SCDES. Photos and location information can help officials track changing conditions.
Remember: harmful algal blooms are dynamic and may appear beyond currently posted watch areas. Stay alert, stay informed, and help protect Lake Hartwell by reporting what you see.