Bromate formation is a complex process that depends on the properties of water and ozone used. Due to fluctuations in quality, surface waters require major adjustments treatment process. In this work, we investigated how time year, dose duration, ammonium affect bromides, bromates, absorbance at 254 nm (UV254), near-infrared (NIR) spectra, fluorescent components (humic-like tyrosine-like) durin...