What is an essential skill for a lifeguard to have regarding pool chemistry?

Understanding pH levels is crucial for a lifeguard, as they play a significant role in maintaining the quality and safety of pool water. Proper pH levels ensure that the water is neither too acidic nor too alkaline, which can affect both the effectiveness of disinfectants, like chlorine, and the comfort of pool users. If the pH is not in the recommended range (typically between 7.2 and 7.8), it can lead to problems such as eye irritation for swimmers, scaling, and compromised hygiene standards.

Being knowledgeable about pH and other chemical levels allows lifeguards to assess water safety and make the necessary adjustments, ensuring a safe environment for all swimmers. They may need to perform regular water tests and respond accordingly to keep the pool safe and enjoyable.