If we know the water quality is poor, do we still go in for a swim? Does the source of this information affect our choices? These are the questions asked by the researchers at the University of Warsaw, as they examine the effectiveness of information regarding waterborne health risks.Their research centres around the Gulf of Gdańsk, which welcomes over seven million tourists each year, on top of a population of around 1.6 million residents. Recent problems with water pollution in Poland could profoundly affect tourism and public health, and the impact of climate change will only cause more problems. How can communication help?