This year's summertime full and with it the Polish sea returned the yearly problem – cyanosis. advanced temperatures and sunlight created perfect conditions for the mass flower of these dangerous microorganisms. As a result, the Chief Sanitary Inspectorate (GIS) closes another bathing area on the Baltic Sea all day, introducing an absolute ban on entering the water. For thousands of tourists planning or already spending their vacation by the sea, this information is critical. Entrance to contaminated water may consequence in serious wellness problems, ranging from nuisance rashes to dangerous poisoning. The problem concerns not only people, but besides pets, which frequently accompany us on the beach. Experts call for reasonableness and ruthless adherence to rescuers' recommendations and wellness messages. In this article, we explain precisely what cynics are, how to admit the threat and where to look for current information about closed beaches.
What are bruises and why are they so dangerous? Experts warn
Contrary to popular opinion, cyanobacteria (cyanobacteria) are not algae, but the bacterium-owned self-food organisms. Their mass flower, visible as a dense green goat on the water, is simply a signal of a serious biological threat. The problem is exacerbated in warm, standing or slow flowing waters, rich in nitrogen and phosphorus compounds, which flow to the sea from crop fields and sewage. That's why Heat in 2025 They've accelerated their improvement so rapidly.
The danger of bruising is due to their ability to produce strong toxins. Experts from the National Institute of Public wellness PZH – National investigation Institute indicate 3 main groups of toxins: neurotoxins (attacking tense system), hepatoxins (hepatic damage) and dermatotoxins (skin reactions). Contact with water containing these substances can lead to a number of problems. The most common are itchy rashes, erythema, conjunctivitis and fever. However, if contaminated water is swallowed, the effects may be much more serious and include diarrhoea, vomiting, abdominal pain, and in utmost cases even liver damage. They are peculiarly susceptible children, aged and allergic.
Current map of closed bathing sites on the Baltic – July 2025
The situation on the Polish coast is dynamic and can change in a fewer hours. Local sanitary and epidemiological stations are decided to close or open bathing sites based on regular water research. Therefore, it is crucial to check the current messages before all visit to the beach. The most reliable and authoritative origin of information is Bath Service of the Main Sanitary Inspectorate. This interactive online map shows the position of all authoritative bathing sites in Poland.
Although the exact list changes daily, historically the problem of cynics most frequently affected circumstantial areas. In July 2025 tourists should take peculiar care especially in the Gulf of Gdańsk. Below we present a list of places that in the past were frequently closed due to the flowering of cynics:
- Baths in Tricity (Gdynia, Sopot, Gdansk)
- Beaches in the Hel Peninsula (mainly from the Puck Bay)
- Swimming pools in Władysławów and Jastrzębia Góra
- Some sections of beaches around Mielna and Kołobrzeg
Remember that this list is indicative. Always verify data on the authoritative GIS website or pay attention to flags displayed by WOPR rescuers on the beach.
How do you identify contaminated water? You can't ignore these signals.
Even if the authoritative message allows a bath, it is worth keeping alert and assessing the water condition yourself. The bloom of blue is not always uniform and can happen locally. There are respective simple signals that should light a red light and prompt you to quit going into the water. First of all, this is change the colour of the water to greenish, greyish-green or brown. The water becomes murky and opaque, and on its surface it floats thick, resembling the spilt coat paint.
Another alarm signal is unpleasant, dense or earthy odourwhich becomes more intense by the shore. A thick foam with greenish colouring is besides frequently formed on the shoreline. A simple test that can be performed is to draw water into a transparent vessel – if after a while a green sediment is formed on the surface, we are most likely dealing with cyanosis. The most crucial principle, however, is the absolute application of beach markings. Red flag means categorical bath ban And you should never underestimate it, even if the water seems clean at first glance.
What to do if you are in contact with cyanosis? First Aid Guide
If you are inactive in contact with contaminated water, you should act rapidly to minimise the hazard of symptoms. First of all, Get out of the water now. and do not let further contact of the skin with contamination. Then take a shower as shortly as possible, thoroughly washing your full body with clean water and soap. Pay peculiar attention to places where the skin is the thinnest and the most sensitive.
The bathing suit that has come into contact with the bruises should be immediately removed and rinse in clean water and wash thoroughly. Keep a close eye on your body for the next fewer hours. In case of any disturbing symptoms specified as severe redness of the skin, rash, blisters, shortness of breath, vomiting or diarrhoea, contact your doctor immediately or the nearest medical aid point. Inform your doctor of possible contact with cyanosis, which will make it easier to diagnose. Remember that wellness is the most important, and temporary cooling in the sea is not worth risking serious wellness problems.
In conclusion, this year's vacation in the Baltic Sea requires all of us to take peculiar care. A blue flower is simply a real threat that must not be underestimated. The key to safe remainder is awareness and regular wellness check. Always trust the red flag and the recommendations of the rescuers – this is the easiest way to make the vacation successful and without unpleasant surprises.
Read more:
Sinice closes Polish beaches! Check where the bath is prohibited. We have a map.
