Overview
- The Gesundheitsamt of the city of Kassel issued an official bathing ban for the Buga‑See on Monday and closed parts of the lake‑fed water playground because of a large cyanobacterial bloom.
- City authorities attribute the mass proliferation to prolonged drought, low lake levels, high air and water temperatures, and strong sunlight creating ideal conditions for blue‑green algae.
- Some cyanobacteria can release metabolic toxins that pose health risks to people and animals, and the bloom has reduced water visibility enough to make rescue and safety operations more difficult.
- The city plans mechanical cutting of overgrown macrophytes with an underwater mowing boat in September and says bathing waters will remain under routine water‑quality monitoring during the season.
- Local officials note the Buga‑See case follows recent warnings at other Hessian lakes such as the Edersee/Rehbach and Twistesee and reflects a recurring seasonal problem linked to hot, dry summers.