Why is it important to monitor chlorine residuals throughout the distribution system and where are typical sampling points?

Why is it important to monitor chlorine residuals throughout the distribution system and where are typical sampling points?

• A. To ensure ongoing disinfection and protect against recontamination; sampling at plant outlets, booster stations, and consumer taps.
• B. To measure pH at the raw water intake.
• C. To monitor turbidity at the reservoir.
• D. To calibrate flow meters only.

Answer: (A)