Which statement about pH is accurate?

Which statement about pH is accurate?

• A. It affects corrosion, coagulation, and disinfection
• B. It only affects taste
• C. It has no impact on treatment processes
• D. It only affects color

Answer: (A)

pH controls how water behaves in several key treatment steps: corrosion, coagulation, and disinfection. When pH is too low or too high, metals in pipes can corrode more readily, potentially releasing metals into the water and affecting pipe integrity. Coagulation depends on the chemistry of coagulants and particle surfaces; the pH determines which species form and how well particles aggregate, so treatment efficiency varies with pH. Disinfection effectiveness also changes with pH because the active form of many disinfectants shifts with acidity or basicity, altering how fast and how completely pathogens are inactivated. While pH can influence taste and color, its most important role in treatment is its impact on these three processes, which is why this statement is the most accurate.

pH controls how water behaves in several key treatment steps: corrosion, coagulation, and disinfection. When pH is too low or too high, metals in pipes can corrode more readily, potentially releasing metals into the water and affecting pipe integrity. Coagulation depends on the chemistry of coagulants and particle surfaces; the pH determines which species form and how well particles aggregate, so treatment efficiency varies with pH. Disinfection effectiveness also changes with pH because the active form of many disinfectants shifts with acidity or basicity, altering how fast and how completely pathogens are inactivated. While pH can influence taste and color, its most important role in treatment is its impact on these three processes, which is why this statement is the most accurate.