In addition, the dipole moment of liquid water is between 2.6-3.0 D. The QM minimized geometry and charges give dipole close to 2.6 D. However, there could be multiple geometry and charge combinations which could give dipole moment in the range 2.6-3.0 D. We also searched through the literature for different water models to get the upper and lower bounds for each parameter. We define our parameter search space such that these bounds include all popular water models and are around the QM minima, and these bounds are listed in the Table .