In Reference 31, the authors concluded that the missing polarizability in non-polarizable models scales the dielectric constant by a factor of 1.78. Under the assumption that the same correction factor would apply to our models, the reference dielectric constant should be reduced by a factor of 1/1.78 = 0.5618. Here we test the effective charge hypothesis by reducing the reference dielectric constants by a factor of 0.56 in the fitting of three-point water models. If the effective charge hypothesis is correct, then we expect the model fitted to a reduced dielectric constant should produce improved agreement with experiment for validation properties. Isobaric heat capacity; D 0 : Self-diffusion Coefficient; η: shear viscosity; TMD: Temperature of maximum density. The TMD for TIP3P model was from reference. The comparison of optimized parameters between TIP3P-ST and the model fitted to reduced dielectric constant, denoted, as TIP3P-ST-0.56 (0), is shown in Table . A main difference is that the atomic charges q H increase and the H-O-H angle widens to accommodate the reduced dielectric constants. The molecular dipole moment is 2.24 D and the selfpolarization correction is smaller at 2.951kJ mol -1 , compared to TIP3P-ST which has a dipole moment of 2.46 D and self-polarization correction of 7.498kJ mol -1 . Table shows the effect on preperty predictions by reducing the reference dielectric constant. The TIP3P-ST-0.56 (0) model is able to reach similar levels of agreement with experiment as the original TIP3P-ST. The heat of vaporization increases further with respect to both experiment and TIP3P-ST. These observations support our earlier assertion that the quality of fitting for dielectric constants mainly depends on the molecular structure parameters and does not have major impact on the ability to fit other thermodynamic properties. However, due to the mixed results in relative accuracy of the models fitted to the original and reduced dielectric constants, we cannot conclude from this study whether correction of the dielectric constant is necessary in general.