This data serves as the supplementary and supporting material for the MSc dissertation titled "Analytical approaches for haloacetic acid disinfection byproducts in treated water". It includes chromatographic and mass spectral data, as well as characterization data of the thin films synthesized. Each step of the classical EPA Method 552.3 was considered and alternatives for each were tested. These included an alternative octanol-based derivatization, for which the optimization results are included in this data, as well as LC-MS based analysis.