How can inadequate water treatment affect swimmers?

Inadequate water treatment can lead to skin or eye irritation for swimmers because the presence of harmful microorganisms, improper chemical balance, and unfiltered debris can create an unpleasant and potentially unsafe swimming environment. Without proper sanitation, bacteria and other pathogens can thrive in pool water, increasing the risk of infections, rashes, and allergic reactions. Similarly, chemicals in the water, like chlorine, must be balanced correctly; if levels are too high or too low, they can cause irritation to the skin and eyes. Maintaining proper water treatment is essential in ensuring that swimmers have a safe and healthy experience.

While other options touch on valid concerns related to pool management, such as temperature and maintenance costs, they do not directly involve the immediate health effects that inadequate water treatment has on swimmers.