Alarm in Ostprignitz-Ruppin: Blue-green algae spoil swimming fun!

Alarm in Ostprignitz-Ruppin: Blue-green algae spoil swimming fun!

Huge quantities of blue-green algae, scientifically known as cyanobacteria, have currently been found in several lakes in the Ostprignitz-Ruppin district. Those affected include the Borker See near Bork, the Große Baalsee near Walkmühle and the Königsberger See at the Königsberg campsite. There is a suspicion of blue-green algae, particularly in the Jahnbad on Lake Ruppiner in Neuruppin, and a laboratory investigation is currently underway. Because of the severely limited visibility of less than 0.5 meters, swimming there and at Lake Borker is strongly discouraged Time reported.

Blue-green algae thrive particularly well in summer temperatures and can produce toxic substances that pose health risks to humans. Symptoms of poisoning range from nausea and vomiting to respiratory problems. People with a weakened immune system, small children and pregnant women are particularly at risk. It is important to pay attention to typical warning signs before swimming: cloudy water, blue-green streaks and a foul smell. Dead fish on the surface of the water are also a clear warning signal NDR informed.

How do these algae blooms form?

The poor conditions for our waters are no coincidence. Sustained heat and nutrient input, especially from agriculture and sewage treatment plants, contribute to the massive proliferation of blue-green algae. Although they have lived on Earth for two billion years and are responsible for around 20% of the world's oxygen, their poisonous species are a serious problem. A rule of thumb says: If you can no longer see your feet in the water because of the bluish-green cloudiness, you should definitely avoid swimming. The Deutschlandfunk points out that high concentrations of cyanobacteria on windless days increase the risk of skin irritation and nausea.

In order to improve the situation, a reduction in nutrient input is necessary - a task that is challenging. Around 6,000 tons of nitrogen currently enter the Baltic Sea every year. The aim is to achieve a reduction of 200 tonnes, but a reduction of 2000 tonnes would actually be necessary to ensure noticeable success. It is important to know that improvements in water quality often become apparent with a time delay because nutrients are stored in sediments.

Given these circumstances, it is crucial that swimmers learn about water quality controls before jumping into the cool waters. The health authorities warn urgently about the risks and appeal to water sports enthusiasts to take personal responsibility. It's important to keep your eyes open and, if in doubt, avoid jumping into the water.