SOS Dublin Bay, a lobbying organization, has warned that one-fifth of swimmers in the city have fallen unwell as a result of the water's condition. A survey of over 1,200 people revealed that 21.8 percent had had negative health impacts from the water, such as diarrhoea, skin rashes, and gastroenteritis. The Irish Times reports that researchers at University College Dublin found high levels of bacteria in several locations around Dublin Bay. They said there is evidence to suggest that many beaches may be more polluted than previously thought. The paper adds that while swimming is not recommended because of the risk of infection, surfing, sailing, and kayaking are all safe in Dublin Bay. You should follow any safety instructions given by lifeguards if you visit any beach in the city. In addition, anyone planning to go swimming in public waters should do so only if the quality of water appears good to reputable organizations like SOS Dublin Bay or the EPA. The best way to avoid getting sick in Dublin Bay is by drinking only bottled water and avoiding eating fish and other seafood which may have been exposed to sewage contamination. Swimming in contaminated waters can lead to infections from bacteria like E. coli and Giardia, as well as chemicals from drugs and human waste. The effects of swimming in dirty water can also cause heart problems and respiratory diseases.