Last weekend, a dog died after a walk on Lake Biel. Probably because of poisoning by blue-green algae.
Blue-green algae are actually not algae, but cyanobacteria. A high concentration of nutrients and a lot of sunlight are the perfect conditions for the blue-green algae . That is why there is always an explosive development of blue-green algae in lakes and water bodies.
Here are the recommendations for dealing with blue-green algae from the Health Department of the Canton of Zurich.
Increased concentrations of blue-green algae can be hazardous to health!
- If the density of algae in knee-deep water is so high that you can no longer see your feet, do not swim.
   your feet, do not swim
- Avoid conspicuously colored water surfaces with streaks and flakes
- People with sensitive skin, including small children, should only bathe in clear water.
   clear water
- Avoid swallowing water
- Always shower well after bathing and dry thoroughly
- Restrict playing and exercising with dogs to suitable shore areas with clear water.
   clear water
 -Do not allow dogs to drink colored water and rinse their fur if they come into contact with it because
   absorption of bacteria by licking is possible
The leaflet is available here (in German only):