Research

Drinking water for more than 20 million Americans is contaminated with a toxic legacy of the Cold War: Perchlorate interferes with normal thyroid function, may cause cancer and persists indefinitely...

Secret tests conducted in 1984 by the DuPont chemical company found a Teflon-related contaminant (C8) in the tap water of the Little Hocking Water Association in Ohio, just across the river from the...

Glacier Water Services, the largest owner-operator of drinking water vending machines in California and the U.S., claims its machines sell “safe, chemical-free water.” But statewide testing found that...

Chlorinating tap water is a critical public health measure that saves thousands of lives each year by reducing the incidence of waterborne disease. But chlorination is no substitute for cleaning up...

Across Ohio, small and large businesses have polluted public drinking water supplies with impunity. An Environmental Working Group analysis of Ohio EPA data and an internal, unpublished report from...

n a little-noticed decision earlier this year, the EPA's top scientific committee on children's health declared that protections against the toxic weed killer atrazine in food and water should not be...

The federal government and the states have adopted a high- cost, high-risk strategy in their drinking water programs, where consumers pay water suppliers to try to make polluted water drinkable. In...

Nitrate in drinking water at levels greater than the Federal standard of 10 parts per million (ppm) can cause methemoglobinemia, a potentially fatal condition in infants commonly known as blue-baby...

Read EWG researchers' top tips to learn how to stay hydrated while reducing your exposures to common drinking water pollutants. Download as PDF