To gain further insight into hydrophobic ordering, we examine how water specifically interacts with the polymers that do not exhibit hydrogen bonding (i.e., PTFE, PE, PE * , PVC, PVC * ). Fig. shows that water orientation with respect to the polymer-water interface differs according to polymer chemistry. In Fig. , the average orientation of water is significantly perturbed in the vicinity of PE and PVC whereas there is no orientational preference in the vicinity of PTFE. Furthermore, PE and PVC exhibit opposite trends compared to the bulk-like behavior (i.e., d > 4 Å): hydrogen atoms of water are on average tilted towards the PE-water interface ( α w < 90 • ) while oxygen atoms tend to be tilted towards PVC-water interfaces ( α w > 90 • ). Interestingly, this demonstrates how distinct interfacial physics of PE and PVC can give rise to very similar "macroscopic" observations, such as the contact angle (Figs. ). Differential interactions (in the force field employed) between the water and polymer atoms can explain some of these trends. In PTFE, water is generally positioned farther from the polymer-water interface relative to the other polymers because of the overall weak attraction of fluorine to water (relative to chlorine to water, for example) and the larger size of fluorine compared to hydrogen, such that nuclear repulsion counterbalances attractive electrostatic interactions at farther distances. Differences in average water orientation may also impact interactions with other species, such as ions, due to the generation of stable local dipoles.