Calculated Flush Time (CFT) or Calculated Flush Volume (CFV) Approach for Representative Distribution System Chlorine and Disinfection Byproduct (DBP) Sample Collection from Building Taps
This guidance document provides details on best practices to consistently and accurately assess drinking water disinfectant residual and disinfection byproduct (DBP) concentrations in samples collected from building taps in order to characterize water quality in the distribution system main.