Variables: oxygen_saturation alkalinity total_cell_concentration waterlevel Keywords: groundwater denitrification Systems: groundwater Substances: Nitrogen (InChI=1S/N2/c1-2) Oxygen (InChI=1S/O2/c1-2) Argon (InChI=1S/Ar) Nitrate (InChI=1S/NO3/c2-1(3)4/q-1)