What does a swim test check before swimming?

The swim test primarily checks the chemical balance of the water before swimming to ensure a safe environment for participants. Proper chemical balance is crucial because it directly impacts water quality, safety, and comfort. Parameters such as pH, sanitizer levels, and alkalinity must be within acceptable ranges to prevent issues like skin irritation, eye discomfort, and the potential spread of waterborne illness.

While water temperature, clarity, and pool depth are important factors for a pleasant swimming experience and safety, they do not play as critical a role in preventing health risks associated with swimming. Without the correct chemical balance, swimming could expose participants to harmful bacteria and other pathogens, making the chemical check a priority before swimmers enter the water.