Can PFAS in public drinking water increase the risk of childhood cancer?

What's actually in it

PFAS contaminate public water supplies near military bases, airports, industrial sites, and places where firefighting foam was used. These forever chemicals don't break down in water treatment and pass through most standard filtration systems. Families in affected areas drink, cook with, and bathe in PFAS-contaminated water for years without knowing it.

Children's developing bodies are more vulnerable to chemical damage, and cancer-causing exposures during childhood can have outsized effects.

What the research says

A 2026 spatial analysis study in Environ Health Perspect examined childhood cancers diagnosed in Southern California between 2000 and 2019. The researchers mapped each child's residential location at birth against PFAS levels in nearby public water systems.

Children born near PFAS-contaminated water supplies had higher rates of certain cancers. The analysis controlled for factors like income, race, and urban density to make sure the link wasn't driven by something else.

The study covered nearly two decades of data, giving it strong statistical power. The association held across multiple PFAS compounds and multiple cancer types.

If you live near a known PFAS contamination source, testing your water is a critical first step. A reverse osmosis or granular activated carbon filter system rated for PFAS removal can protect your family's drinking water at home.