MetalZorb is a high-capacity sponge filtration medium that effectively removes and recovers dissolved heavy metals—including lead, mercury, zinc and gold—from storm water and wastewater discharge. It is a non-toxic, biodegradable, organic polymer that helps achieve NPDES and EPA regulatory compliance with up to a 90% reduction in as little as 20 seconds. No backwash is required, it provides low impedance to flow, it is highly absorptive, it permanently absorbs pollutants, and there is no leaching or metal loss.