Can drinking water with PFAS raise your blood levels of forever chemicals?

What's actually in it

Public water systems across the U.S. contain PFAS from industrial contamination, fire-fighting foam runoff, and consumer product waste. Standard water treatment doesn't remove these chemicals effectively. When you drink tap water containing PFAS, the chemicals enter your bloodstream and stay there for years because your body can't break them down.

What the research says

A 2026 study in J Expo Sci Environ Epidemiol compared PFAS levels in public drinking water with blood PFAS levels in Southern California adults. The researchers found a direct link between the two: people whose tap water had higher PFAS levels also had higher PFAS in their blood.

The study confirmed that drinking water is one of the main pathways for PFAS to get into your body. Even at concentrations that some agencies consider acceptable, daily drinking over months and years leads to steady accumulation in your blood and organs.

Check your water utility's PFAS testing results, which are now required in many states. Install a reverse osmosis or granular activated carbon filter rated to remove PFAS. For the biggest impact, filter the water you drink and cook with daily.