Watch out for polluted water
If you think you can go for a swim, it turns out that there are blue-green algae in the water. Almost every summer, bathing water is rejected for this reason in various Dutch places. Blue-green algae or blue-green algae are bacteria that look like seaweed. They mainly occur during hot days. But what’s so harmful about it?
Algae are tiny plants that float in water. They can multiply well if there is enough light and a high temperature. They can grow so explosively that entire layers of algae are formed.
This happens especially when it is dry and fairly warm for a longer period of time. A lot of water then evaporates from the puddles, while this is not replenished with fresh water. This causes the bacteria to accumulate and form a layer that resembles oil. The blue algae eventually die in such a layer. They form a foul-smelling paste and secrete toxic substances.
contaminated water
Not every swimming water is bothered by the algae. Standing water is especially affected quickly, for example larger pools and ponds that are located in residential areas, but also canals. It is difficult to indicate in advance where the blue-green algae will strike. The local situation – such as the depth of the water, the vegetation and the connection with other water – plays a major role. One water may be contaminated, while a lake a few miles away is fine.
Symptoms
Within twelve hours of swimming in water with blue algae, people can experience the following symptoms:
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Headache
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Skin rash on arms or legs
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Stomach cramps, nausea, vomiting or diarrhea
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Fever
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A sore or red throat
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Earache
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Eye irritations
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runny nose
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swollen lips
These symptoms last for about five days and disappear on their own. Everyone reacts differently. Children are more vulnerable than adults because they are more likely to swallow water while swimming. Animals that have been in the water can also get complaints.