Is lead in tap water linked to cancer?
Yes. Lead exposure from drinking water is associated with head and neck cancer risk.
What's actually in it
Lead gets into tap water primarily from lead service lines (pipes), lead solder in older plumbing, and lead-containing brass fittings. The EPA's legal limit for lead in drinking water is 15 parts per billion, but the CDC says no level of lead is safe. Lead is a known carcinogen. The World Health Organization classifies it as a probable human carcinogen for several cancer types.
Old homes (built before 1986) are most at risk, but even newer buildings can have lead-containing fittings.
What the research says
A 2026 study in Otolaryngol Head Neck Surg analyzed associations between lead in drinking water and head and neck cancer rates across U.S. communities. Areas with higher drinking water lead levels had statistically significant higher rates of head and neck cancer. The association held after controlling for other risk factors like smoking and alcohol.
Head and neck cancers include cancer of the mouth, throat, larynx, and salivary glands. These are all directly exposed to whatever is in the water you drink.
A certified lead-removal filter (NSF/ANSI 53 or reverse osmosis) removes lead from tap water. Store filtered water in glass food storage to avoid adding plastic contamination.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Association of Lead in Drinking Water With Head and Neck Cancer in the United States | Otolaryngol Head Neck Surg | 2026 |
What to use instead
Browse our curated non-toxic alternatives. Every product is third-party certified.
Shop Non-Toxic Kitchen