The presence of pharmaceuticals, endocrine disruptors, personal care products, and
micropollutants in drinking water sources has led many drinking water treatment plants to
consider additional barriers of treatment. One of these barriers shown to be successful at
reducing the concentrations of these compounds is ultraviolet (UV) irradiation and advanced
oxidation using UV and hydrogen peroxide (H2O2) to produce hydroxyl radicals. This paper discusses experiments performed to elucidate the change in regulated disinfection byproduct
formation after UV and UV/H2O2 processes followed by the application of free chlorine to
quench the peroxide and provide a residual disinfectant. Includes 8 references, table, figures.