Our current objective is the development of materials for the selective adsorption of TNT and RDX from air and water sources. An arylene-bridged nanoporous organosilica has been developed that selectively adsorbs aromatic hydrocarbons. While the performance of the porous organosilica is comparible to that of activated carbon, unlike activated carbon, the organosilica can be readily regenerated. This material selectively adsorbs TNT from a mixture of aromatic hydrocarbons with a detection limit of 0.5 micrograms/L (0.002 micromoles/L), well below the U.S. EPA advised maximum allowable 140 micrograms/L (0.62 micromoles/L) TNT concentration in drinking water. We have demonstrated that the enhanced aging, mechanical, and hydrothermal stability of these nanoporous organosilicas makes this well suited for use in advanced adsorption applications. In an effort to better tailor the properties of PMOs, we have recently begun to investigate ordered PMO copolymers adsorbents containing more than a single organic functional group in the pore walls. Recent results of research aimed at further development of these materials for efficient adsorption of aromatic compounds such as PAHs and TNT in the presence Natural Organic Matter (NOM)will be discussed.