Can groundwater chemistry affect lead levels in children's blood?

What's actually in it

Lead gets into drinking water from old pipes, solder, and plumbing fixtures. But the amount of lead that actually dissolves into your water depends on the chemistry of the local groundwater: its acidity, mineral content, and dissolved gases. Soft, acidic water is much more likely to pull lead from pipes than hard, mineral-rich water.

What the research says

A 2026 study in Geohealth analyzed groundwater chemistry and children's blood lead levels across U.S. counties. The researchers found that areas with certain groundwater conditions had higher blood lead levels in children. Water that was more acidic or had lower mineral content dissolved more lead from aging infrastructure.

Even when lead pipe replacement programs are underway, the water chemistry matters. Children in areas with aggressive water (water that corrodes pipes more) faced higher exposure. There is no safe level of lead for children.

Test your home's water for lead, especially if your home was built before 1986. Use a NSF-certified lead removal filter on your kitchen tap. Run cold water for 30 seconds before using it for drinking or cooking to flush out standing water that absorbed lead overnight.