Three Toronto beaches have been deemed unsafe to swim due to high levels of bacteria in Lake Ontario on Friday. E.coli levels at Marie Curtis Park East in Mississauga, Sunnyside Beach in downtown Toronto, and Kew Balmy Beach in the Beaches have been labelled as “unsafe to swim” by the City of Toronto ahead of the weekend. E. coli are a bacteria that can cause diarrhea, urinary tract infections, respiratory illness and pneumonia, and other illnesses, according to the Centre for Disease Control and Prevention. The levels are predicted to be above 100 E.coli per 100ml of water, which may pose a risk to human health, according to the city’s water quality data.