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Impact of Arsenic Treatment Techniques on Distribution Water Quality
Citation:
SORG, T. J., A. Chen, AND L. Wang. Impact of Arsenic Treatment Techniques on Distribution Water Quality. Presented at AWWA Water Quality Technology Conference & Expo, Phoenix, AZ, November 13 - 17, 2011.
Impact/Purpose:
To inform the public.
Description:
This presentation will summarize the results of the distribution water quality studies (arsenic, lead, and copper) of the demonstration program. The impact of the treatment systems by type of system (adsorptive media, coagulation/filtration, ion exchange, etc) will be shown by comparing the water quality of the base line data prior to system start up to the data collected after system start up. In most cases, the arsenic level in the distribution system mirrored the arsenic concentration entering the distribution system. In some cases, the arsenic levels in the distribution water were slightly higher than the treated water indicating desorption of arsenic from the distribution system. In very sites were the lead and copper levels increased in the distribution and where increases were found most were less the MCLs. In a number of cases, the lead and copper levels were less after treatment than before treatment.
