Response to Comment on 'Nitrification in Premise Plumbing: Role of Phosphate, pH, and Pipe Corrosion'. Study Used Conditions That Are Realistic and Representative

摘要

We disagree with Mr. Brown's statement that the experiments were a "set up" not representative of actual conditions present in some consumers' homes.rnFirst, while it is true that most utilities dose chloramine and chlorine disinfectant to water at the treatment plant, the chlorine residual disinfectant can disappear completely by the time the water reaches many home plumbing systems. This is one reason that the National Research Council recently identified problems in premise plumbing as a high priority for future research (see Chapter 8, of the National Research Council Report (NCR) Drinking Water Distribution System: Assessing and Reducing Risks). That report also contains data illustrating that, even if free chlorine or chloramine are present in the water coming into the homes, it can disappear very rapidly via reactions with home plumbing systems as it sits in the pipe. Hence, our testing without any disinfectant present is perfectly representative of what occurs in many homes.