Does a water filter remove lead?
Short answer
Only filters certified to NSF/ANSI Standard 53 for lead reduction are tested for that claim. Check the package and NSF's listings for 'lead' specifically, follow cartridge replacement dates, and note that boiling water does not remove lead (Denver Water says so directly).
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Source: NSF listings: lead reduction (NSF/ANSI 53) (checked Oct 15, 2026).
Frequently asked questions
How can I tell if my water pipe is lead?
Find where the water line enters your home, usually near the meter. Lightly scratch it with a coin or key. Lead is soft, dull gray, scratches to shiny silver, and a magnet will not stick. Galvanized steel attracts a magnet. Copper scratches to a penny color. Confirm with your utility.