Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS) data of stable isotope labelled ozonation products (OP) in wastewater effluent organic matter (EfOM).

Processed and quality checked FT-ICR MS data for effluent organic matter ozonated with heavy oxygen (Oz_EfOM) and control sample (non_Oz_EfOM). Sample details, sample ozonation, measurement conditions and data evaluation workflows are described in the companion papers (Jennings et al. 2023:https://doi.org/10.1016/j.watres.2022.119477 and Olea et al. 2023: https://doi.org/https://doi.org/10.1016/j.watres.2023.119740).