What are the signs of high chlorine levels in a pool?

High chlorine levels in a pool can manifest through various physical symptoms and sensory indicators. When chlorine levels exceed the recommended range, often above 5 parts per million (ppm), users may experience eye irritation and skin rashes. This occurs because excessive chlorine can be irritating to mucous membranes and skin. Additionally, a strong chlorine smell is a common sign, which may seem counterintuitive since many associate the scent with cleanliness. In fact, a strong chlorine odor may indicate that the chlorine is reacting with contaminants in the water rather than effectively sanitizing it.

This option encapsulates the primary symptoms and consequences of excessive chlorine use, making it the correct choice. Signs such as irritation and the overpowering smell highlight the need for monitoring and balancing chemical levels to ensure a safe swimming environment. Understanding these symptoms is crucial for maintaining proper pool chemistry and ensuring the health and safety of swimmers.