Sample water chemistry and dissolved organic matter composition data for streams in six Canadian ecozones

This dataset contains water chemistry (major ions, inorganic nutrients) and dissolved organic matter (DOM) composition data for 52 streams sampled in 2019-2021 at several research sites across Canada. DOM composition was analyzed using UV-vis absorbance and fluorescence, Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), and asymmetric flow field-flow fractionation (AF4).