Is it safe to drink water from a lead-free brass faucet in an old house?
Use caution. Lead-free plumbing can still release lead, and older pipes can add more.
What's actually in it
Under U.S. rules, lead-free plumbing can still contain a small amount of lead. In an older home, the faucet is only one part of the system. Lead service lines, old solder, brass fittings, and galvanized pipe can all affect drinking water.
The first water out of the tap after sitting overnight can carry more lead because it has been in contact with plumbing for hours. Children and pregnant people need extra caution because lead has no useful role in the body.
What the research says
A 2026 study in Environmental Science & Technology tested U.S. drinking water kiosks. Researchers often found higher lead in kiosk water than in nearby tap water, and the pattern matched corrosion from lead-containing plumbing parts, even though the parts met the legal definition of lead-free.
The CDC lead-in-water guidance says common sources include lead pipes, faucets, and plumbing fixtures. It recommends a point-of-use filter certified to NSF/ANSI 53 for lead removal when lead is a concern, and using only cold tap water for drinking or cooking.
Test first. Use cold water. Flush the tap after water sits. Use a certified lead filter if the home has lead plumbing risk. After water is tested or filtered, store it in glass instead of plastic.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Water Quality of U.S. Drinking Water Kiosks: Lead Release from "Lead-free" Plumbing after Reverse Osmosis Treatment. | Environ Sci Technol | 2026 |
| About Lead in Drinking Water | CDC | 2025 |
What to use instead
A certified lead filter comes first. For tested or filtered water, glass kitchen storage and drinkware are the better everyday default.
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