Strategies for Using an Online Analyzer for Chloramination Control

Chlorine has been used for over 100 years as a potable water disinfectant.

Chlorine has been used for over 100 years as a potable water disinfectant. Chloramine has been used as a disinfectant in the U.S. since the 1930s. Chloramine is formed by mixing chlorine with ammonia in a precise ratio. In most cases, chloramine is used as a secondary disinfectant while chlorine serves as the primary disinfectant. Use of chloramine has been shown to reduce the formation of trihalomethanes (THMs), while also reducing certain taste and odor problems. Another advantage is that chloramine is more stable, therefore extending disinfectant residual throughout the distribution system.

Waterford Township, MI, Department of Public Works (DPW) serves a population of 74,000 people through 25,000 metered connections and 360 miles of water main. Located 40 miles northwest of Detroit, Waterford’s 36 square miles of service district draws its water from 15 wells to satisfy an average daily demand of 8 mgd, peaking to 22 mgd in the summer months.

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