What immediate action is required if disinfection levels in a pool are not legal?

When disinfection levels in a pool fall below legal standards, the most appropriate immediate action is to close the pool until the issue is resolved. This step is essential for ensuring the safety and health of all pool users. Insufficient disinfection can lead to the growth of harmful microorganisms, increasing the risk of waterborne illnesses. By closing the pool, operators are preventing exposure to unsafe water conditions and protecting public health.

Maintaining legal disinfection levels is crucial for compliance with health codes and regulations; operating a pool with inadequate sanitation not only poses a health hazard but can also result in penalties or fines for the facility. Once the disinfection levels are brought back into compliance, the pool can be reopened safely.