AWWA JAW63372

In this research, 27 waters were obtained from utilities across the United States (3 for each of the 9 elements in the 3 ¿¿ 3 enhanced coagulation matrix of the Disinfectants/Disinfection Byproducts Rule) in order to evaluate how the waters responded to coagulation and chlorination. The objectives of this work were to: reinforce findings and improve on limitations associated with an earlier analysis of the Information Collection Rule database; investigate the susceptibility of the waters to removal of organic matter by enhanced coagulation; and, evaluate the removal of total organic halide (TOX) precursors and relate this behavior to the specific ultraviolet absorbance (SUVA) of the raw water. Results demonstrated that SUVA can be used by utilities to determine the amenability of source water organic material to removal by coagulation. Recognition of the value of SUVA by utilities and legislators could assist in defining more appropriate and achievable treatment strategies in the future. Includes 30 references, tables, figures.