By analyzing people’s chemical body burden, we can uncover new exposures associated with health risks and show the power of prevention through a reduction in people’s exposures to toxics.

Biomonitoring is an effective tool for assessing people’s exposures by testing their bodies (through urine, blood, saliva, breast milk, and other biological samples) for the presence of environmental chemicals. The practice has been used for decades to document exposures, including beginning in the late 1970s when the Centers for Disease Control (CDC) tracked a decline in blood lead levels in the U.S. population following the phase-out of leaded gasoline. Today, thanks to advances in technology, we are able to measure an increasing number of chemicals in people’s bodies, and at lower levels, allowing us to observe with greater precision the health risks associated with everyday exposures.

Related Projects


Detox Me Action Kit is a crowdsourced biomonitoring study on people’s everyday exposure to common household and environmental toxics.

Understanding how people are exposed to toxic chemicals called PFAS will help us develop strategies and inform policies to reduce people's exposures and protect health.

We are investigating on-the-job exposures to chemicals linked with breast cancer among female workers.


Our Household Exposure Study in Northern California was the first comprehensive analysis of endocrine disrupting chemicals (EDCs) in low-income, minority homes, and the first study to test for large numbers of EDCs outdoors.