Water Treatment Plant Operator Practice Exam 2025 – Complete Test Prep

The method that is being used more increasingly due to its relative safety in comparison to gaseous chlorine is hypochlorination. This process involves the use of liquid sodium hypochlorite or calcium hypochlorite to generate chlorine for disinfection purposes.

Hypochlorination poses a reduced risk of exposure to toxic gases that can occur when using gaseous chlorine. Unlike gas, which requires careful handling and storage precautions due to its hazardous nature, hypochlorite solutions are easier to manage and handle safely. This factor makes hypochlorination a preferable option for many treatment plants, particularly those that prioritize worker safety and environmental considerations.

Additionally, hypochlorination allows for more precise dosing and immediate availability of chlorine in a liquid form, enhancing the effectiveness of the chlorination process. As water treatment practices evolve to emphasize safety and risk management, hypochlorination continues to gain popularity among operators and in new facilities.