What is the recommended range for pH levels in swimming pools?

The recommended range for pH levels in swimming pools is 7.2 to 7.8, making option C the most accurate choice. Maintaining the pH within this range is vital for several reasons. It helps ensure effective chlorination, as chlorine works best at a slightly alkaline pH. A pH that is too low can lead to corrosion of metals and damage to plaster finishes in pools, while a pH that is too high can cause the water to become cloudy and reduce chlorine's effectiveness.

When pH levels are maintained within this ideal range, it also promotes swimmer comfort and reduces irritation to the eyes and skin. Pool operators regularly monitor and adjust pH levels to ensure that they remain within this optimal range, as it significantly affects water balance and overall pool health.

Keeping the pool water in this range also aids in the effectiveness of other chemical treatments, maintaining algae and bacteria control, and ensuring a pleasant swimming experience for all users.