What must be recorded during a pool fouling incident according to protocols?

The key aspect of a pool fouling incident is ensuring the safety and cleanliness of the water. Recording the chemical readings from various areas of the pool is crucial because it provides objective data about the water quality at the time of the incident. This information helps determine if the pool is safe for swimmers and whether immediate action needs to be taken, such as closing the pool or treating the water. Monitoring chemical levels, such as pH, chlorine, and other disinfectants, allows staff to assess the impact of the fouling and implement corrective measures as needed.

In contrast, recording only the time of the event lacks detail and does not provide the necessary information for a thorough incident review or follow-up actions. Noting the names of all swimmers present may be useful for tracking exposure, but it does not directly address the pool's water quality. The supervisor's opinion, while potentially valuable for insight, is subjective and does not contribute to the data-driven response required to manage the situation effectively.