What should be continuously monitored and recorded to control corrosion as water enters the distribution system?

• A. Chlorine levels
• B. pH of the water
• C. Temperature of water
• D. Water turbidity

Answer: (B)

To control corrosion as water enters the distribution system, the pH of the water should be continuously monitored and recorded. The pH level of water is critical because it directly influences the water's corrosivity. Water that is too acidic (low pH) can cause increased corrosion of metal pipes and fixtures, leading to issues such as the leaching of heavy metals and potential damage to infrastructure.

When the pH is maintained within an optimal range, it helps to form a protective layer on the surfaces of pipes and prevents corrosive reactions. This is why water treatment facilities focus on adjusting and monitoring pH levels regularly. Proper pH management not only improves water quality but also extends the lifespan of the distribution system, ensuring safe and reliable delivery of water to consumers.

Chlorine levels, temperature, and water turbidity are important parameters in water treatment, but they do not have the same direct impact on corrosion control in the distribution system as pH does. Chlorine is mainly concerned with disinfection, temperature can affect chemical reactions but is less critical for corrosion, and turbidity relates to the presence of suspended particles rather than chemical corrosivity. Therefore, monitoring pH is paramount for addressing corrosion issues effectively.