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Many water utilities are facing increasingly complex decisions regarding the appropriate treatment of their source water in order to achieve both regulatory compliance and meet customer expectations. This has been especially evident with the recent promulgation of the revised arsenic standard. Groundwater systems that have not yet faced actual treatment will now be required to implement technologies that are both new to the drinking water industry and unproven in terms of their long-term performance. Therefore, careful consideration of the multiple water quality concerns that could affect treatment decisions is key to developing appropriate strategies for arsenic control. The list of contaminants of concern continues to grow as public health concerns are raised regarding inorganic, radionuclide, and organic species commonly found in groundwater systems. In addition to the health-related contaminants, utilities must still address the aesthetic quality of their potable supplies and the acceptability of these waters by consumers. New to many groundwater systems will be the effect of constituents in the "water quality matrix" that could interfere or affect performance of various technologies applied to control the contaminants of concern. Finally, either due to regulatory requirements or the introduction of treatment systems, many undisinfected groundwater supplies will find it necessary to apply free chlorine, subjecting them to disinfection byproduct (DBP) control issues. Therefore, increased knowledge of DBP precursors and those water quality issues that affect DBP formation will be critical to future treatment decisions. This paper discusses arsenic control technologies and gives a listing of water quality relationships for the various treatment selections. Includes figures.

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Edition: Vol. - No. Published: 11/01/2002 Number of Pages: 6File Size: 1 file , 430 KB