Swimming Pool Operator Certification Practice Exam 2025 - Free Practice Questions and Study Guide

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What is the ideal pH level for swimming pool water?

6.8 to 7.2

7.2 to 7.8

The ideal pH level for swimming pool water is typically between 7.2 and 7.8. This range is considered optimal because it helps to ensure comfort for swimmers, protects the pool equipment, and maximizes the effectiveness of chlorine as a disinfectant. When the pH is within this range, it helps prevent irritation to the skin and eyes of swimmers while also reducing the likelihood of corrosion or scale buildup on surfaces and equipment.

Maintaining pH within this ideal range also supports the overall chemical balance of the pool, facilitating proper sanitation and clarity of the water. If the pH level falls below 7.2, it can lead to acidic conditions, causing discomfort and potential damage. Conversely, if the pH rises above 7.8, it can lead to cloudy water and reduced effectiveness of chlorine, requiring additional chemicals to correct. This narrow but essential pH range underscores the importance of regular monitoring and adjustment to support both swimmer health and pool maintenance.

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7.8 to 8.5

8.5 to 9.0

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