Nanofibers are classified as fibers less than 1 micrometer in diameter. These fibers can be layered to form nanofibrous membranes offering great potential in the filtration industry. The membranes' smaller fiber diameters and pore sizes permit such filters to filter out more and smaller particulate than today's more traditional filters. Additionally, antimicrobial agents can be incorporated into the membrane to inhibit fungal and bacterial growth on the membrane's surface. This report evaluates nanofibrous membranes with antimicrobial agents and their potential in locations where bacterial and fungal growth would have an especially detrimental effect on the process or occupant of the space.