ULTRA-D submicron depth filters use proprietary, patented, electroadsorptive media technology that removes pathogens and inorganic contaminants through electro-adhesion and ion exchange. This technology allows nonwoven media to produce filtration efficiency comparable to UF but at low pressure drop, with high flow rates and loading capacity working equally well in freshwater, brackish water or saltwater. The filters are certified for up to 99.99% reduction of viruses, bacteria, and cysts; greater than 95% reduction of lead; and reduction of arsenic, mercury and other heavy metals, residual pharmaceuticals, PCBs and BPA. They are available in eight models, with 2.5- and 4.5-in. diameters and 5- to 40-in. lengths.