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New data released by the U.S. Environmental Protection Agency shows that millions of Americans are drinking water that is contaminated with the carcinogenic chemicals PFAS, otherwise known as 'forever chemicals'. Professor Vasilis Vasiliou, chair of the YSPH Department of Environmental Health Sciences, says the findings underscore the magnitude of the problem PFAS presents.

Any patient has the right to undergo blood testing for so-called 'forever chemicals' formally known as PFAS, but the limitations of testing must be discussed with the patient, advises Dr. Vasilis Vasiliou, Yale School of Public Health professor and chair of the Department of Environmental Health Sciences. Yale Research Associate Phil Zuccaro and Dr. Damaskini Valvi of the Icahn School of Medicine join Vasiliou as co-authors of the advisory.

A new review has found that exposure to particular chemicals can, when combined, enhance damage to the liver. The researchers of the July 2025 review, published in Toxicological Sciences, found that both alcohol and PFAS chemicals—a group of widely-used compounds—damage the liver in similar ways. This could be "causing fat buildup, inflammation, and oxidative stress," Vasilis Vasiliou, one of the authors of the review, and chair and professor of environmental health sciences at Yale School of Public Health, told Newsweek.

An artificial turf field on a summer day is hotter than grass and asphalt. Here’s what to know about the debate over grass vs. turf. YSPH environmental epidemiologist Dr. Vasilis Vasiliou, PhD, shares his expertise on the matter.

News 12’s What’s In The Water series offers an exclusive look at a Yale University study into 1,4 dioxane, which has been classified as a potential carcinogen.

A study found a total of 324 contaminants in drinking water, with 12 identified across all 50 states. YSPH Professor Vasilis Vasiliou comments.

Yale University’s global engagement efforts took center stage in Athens this month, as President Maurie McInnis and former President Peter Salovey traveled to Greece to advance an ambitious academic collaboration with the National and Kapodistrian University of Athens (NKUA). Vasilis Vasiliou, the Susan Dwight Bliss Professor of Epidemiology and chair of the Department of Environmental Health Sciences at the Yale School of Public Health, initiated Yale’s collaboration with NKUA along with YSPH colleague adjunct professor Nikolaos Thomaidis in 2019.

The findings suggest that health risks may occur below levels currently considered safe by the EPA's arsenic limit that was determined in 2001.

A study has shown that arsenic levels in public drinking water systems are higher in some states, which can increase the risk of low birth weight and other