As summer arrives in Ontario, experts highlight the importance of safety at the province's beaches. With a forecast of warmer-than-average temperatures, the demand for swimming is expected to rise. However, water quality can be affected by factors such as rainfall, which can increase bacteria levels due to stormwater runoff. Gregory Ford, vice-president of Swim Drink Fish, emphasizes the need for beachgoers to check local advisories before swimming. Toronto Public Health monitors water quality at 10 beaches, with a strict E. coli standard to ensure safety. Following heavy rain, it is recommended to wait 24 to 48 hours before swimming to reduce health risks from contaminated water. Additionally, harmful algal blooms can occur, particularly in warmer conditions, and swimmers should be cautious of discolored water. Mayor Olivia Chow announced a 25% increase in lifeguard numbers to ensure safety during the season. Overall, residents are encouraged to stay informed and enjoy Ontario's beaches responsibly this summer.