Which office is responsible for performing residual chlorine/pH water testing every 30 minutes?

• A. Bioenvironmental engineering.
• B. Civil engineering.
• C. Preventive medicine.
• D. Public health.

Answer: (B)

Measuring residual chlorine and pH on a frequent, half-hourly basis is about maintaining the water distribution system and its treatment controls. The civil engineering office is responsible because they oversee the physical water supply infrastructure—pipes, pumps, chlorination and pH adjustment stations, and the instrumentation that monitors and controls these parameters. They establish and run the routine monitoring to ensure the system keeps disinfectant levels and acidity/alkalinity within safe ranges, promptly addressing any deviations. Bioenvironmental engineering focuses on environmental health and safety of personnel, while preventive medicine and public health concentrate on health surveillance and disease prevention rather than the ongoing operation and monitoring of the water system.