Detection of Blue Algae Wupperverband and the Health Department of the Oberbergischer Kreis provide information.

Oberbergischer Kreis. During today's inspection at the Bruchertalsperre, blue-green algae were detected in the area of the Segelclub bathing site. As a result, the health department of the Oberbergischer Kreis has issued a swimming ban for this bathing site. The health department also appeals to personal responsibility when engaging in activities at the reservoir. Contact with blue-green algae should be strictly avoided.

What are blue-green algae
Blue-green algae are not algae but bacteria, often exhibiting a blue-green coloration. Blue-green algae occur naturally in water bodies but can cause problems when they proliferate massively. High temperatures promote their development.

Avoid contact
Most types of blue-green algae are harmless to humans and cause an unpleasant odor as they decay. However, some can produce toxins that may affect health. At high concentrations, blue-green algae can cause symptoms such as allergic reactions, skin irritations, or earaches in humans and animals (e.g., swimming dogs). Swallowing contaminated water may lead to nausea, diarrhea, and vomiting. Particularly young children and highly sensitive individuals should avoid contact with blue-green algae.

Recognizing blue-green algae
When blue-green algae proliferate massively, they accumulate on the water's surface (streaks). The cyanobacteria turn the water blue-green (cyan). An initial sign of blue-green algae formation is low visibility due to significant water turbidity. Avoid swimming if you cannot see your feet when standing knee-deep in water. Do not swim if you notice distinct green or blue-green streaks on the water's surface.

For more information, visit www.obk.de/badegewaesser.