We first derive the asymptotic atomic parameters (charges, multipoles, dispersion coefficients, and atomic polarizabilities) at equilibrium geometry, compute the long-range dimer interactions, and compare them with SAPT term by term. When we keep the monomer geometries fixed at equilibrium geometry, the dimer scan results are in excellent agreement with SAPT, as shown in Figure . In 90% of all the dimer scans, small relative errors are observed for all components when the intermolecular distances are larger than 4Å, as shown in Figure (a) and (b). In few (less than 10%) cases, as plotted in Figure (c), we see slightly larger relative errors in between 4-5Å, due to the small interaction energy values. Then, we test the dimer scans of flexible water molecules and compare the resulting total long-range interaction energies with CCSD(T). We select three dimer configurations, representing the best, the medium, and the worst performers among all the scans, and plot them in Figure (a). Both the medium and the worst performers show visible errors, indicating that about half of the flexible dimers are not well described by the parameters obtained at the equilibrium geometry. These results indicate that the geometry-dependence of the atomic parameters are important for water, while it has been universally