Water interactions near ionic molecular interfaces are an important aspect of biology and surface science. Ion-polar forces at the interface segregate the water phase into interfacial and bulk-like domains that have distinctly different properties. Understanding molecular interactions in these water domains is important to the assembly of biological membranes, the synthesis of nanoparticles, and emulsion science. We have used vibrational spectroscopy to probe differences in interfacial and bulk-like waters in AOT reverse micelles. FTIR spectroscopy of the water OH stretching band was used to measure individual spectra of the separate interfacial and bulk-like water domains and also the dimensions of the interfacial region. Hydrogen bonding and composition differences between the water domains are inferred from the spectra.