AWWA ACE93150

AWWA ACE93150 Chloramine Stability in the Ann Arbor Water Distribution System
Conference Proceeding by American Water Works Association, 01/01/1993

Deininger, R.A.; Lai, K.L.; Bernstam, E.V.; Mieske, H.; Sanford, L. ; Skadsen, J.; Clark, R.; Rossman, L.

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In previous years the water distribution system of Ann Arbor experienced a strong decline in the chloramine residuals measured at distant sampling places. The problem was perplexing, but a raise in the pH of the water caused a much greater stability in the chloramine residuals. In September and October of 1992 a major experiment was performed to study the effect of a lower pH value and a number of water quality parameters were monitored at numerous sampling points. A geographical information system was used to follow the changes, and a computer model (EPANET) was used to predict the water quality changes. Remote monitoring techniques were used to continuously monitor chloramines. The results and implications of this study are presented.