Some whole-house water filters remove lead and other heavy metals like mercury, iron, copper, manganese, chromium, and arsenic. However, not all systems are designed to eliminate lead, even if they can filter other heavy metals, so be sure to check the product description before purchasing one. If there is lead in your water supply, Epstein recommends getting a reverse osmosis system that meets NSF (National Sanitation Foundation) certification standards. Whole-home water filters with kinetic degradation fluxion (KDF) media can also be effective in removing lead.