Does indoor air pollution affect your child's brain development?

What's actually in it

The air inside your home contains a mix of chemicals that come from cleaning products, furniture, building materials, and personal care items. These pollutants include persistent organic pollutants and endocrine-disrupting chemicals that do not break down easily. They build up in your indoor environment over time.

Children are more vulnerable because they breathe faster, spend more time indoors, and their brains are still developing. Even low-level, constant exposure to these chemicals can interfere with the hormonal systems that guide healthy brain growth.

What the research says

A 2026 study in Environ Res found that maternal exposure to indoor and outdoor air pollution during pregnancy increases the child's risk of autism spectrum disorder. The study highlights that the chemicals present in household air can reach a developing baby and disrupt critical processes during brain formation.

Indoor pollutants also affect the thyroid, which plays a key role in brain development. A 2026 study in Ecotoxicol Environ Saf analyzed the combined effects of persistent organic pollutants and endocrine-disrupting chemicals on thyroid disease risk. The research found that exposure to mixtures of these chemicals, the kind found in everyday household products, significantly raises the risk of thyroid problems.

At the molecular level, these effects are measurable. A 2026 study in Environ Res conducted an epigenome-wide analysis and found that household air pollution exposure changes how genes are expressed. These changes are linked to increased disease risk and show that indoor air quality has a direct biological impact on the people living in your home.