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At EWG,
our team of scientists, engineers, policy experts, lawyers and computer programmers pores over government data, legal documents, scientific studies and our own laboratory tests to expose threats to your health and the environment, and to find solutions. Our research brings to light unsettling facts that you have a right to know.

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Research Content

Thyroid Threat

Under Proposed Rocket Fuel Standards, Many Women Would Need Treatment To Protect Baby
Exposure to the rocket fuel contaminant perchlorate can cause a significant decline in thyroid hormone levels, which is an established risk factor in fetal development.

Dead in the Water

An annual flood of wasted fertilizer from heavily farmed land in the Mississippi River Basin runs off into the Gulf, where it feeds the development of massive algae blooms, removing oxygen from the water and creating the Dead Zone.

Chrome-Plated Fraud

How PG&E's Scientists-For-Hire Reversed Findings of Cancer Study

National Assessment of Tap Water Quality

More than 200 contaminants with no enforceable safety limits found in the nation's drinking water
More than 200 contaminants with no enforceable safety limits found in the nation's drinking water. Search our database for your water quality reports.

Harvard Fluoride Findings Misrepresented?

Newly obtained documents show that the chairman of the Department of Oral Health Policy and Epidemiology at Harvard told federal officials unequivocally that there was no relationship between fluoride and bone cancer, but a grant-funded publication he cites found exactly the opposite.

Like Oil and Water

As Congress Considers Legal Immunity for Oil Companies More Communities Go To Court Over MTBE Pollution

Rocket Fuel in Cows' Milk - Perchlorate

Findings Indicate State's Proposed Standard Too Weak to Protect Children
In the first study to look for perchlorate in California supermarket milk, EWG found the rocket fuel chemical in almost every sample tested -- 31 out of 32 samples. Milk from some California cows may expose infants and children to higher levels of perchlorate than what the U.S. EPA deems safe.

MTBE In Drinking Water

An EWG analysis finds that drinking water supplies for over 15 million Americans are contaminated with MTBE, a suspected carcinogen added to gasoline that even at trace levels renders water undrinkable due to foul taste and odor.

Food News v. 2.0

An EWG simulation of thousands of consumers eating high and low pesticide diets shows that people can lower their pesticide exposure by 90 percent by avoiding the top twelve most contaminated fruits and vegetables and eating the least contaminated instea

Suspect Salads

Lettuce grown during the winter months may contain higher levels of toxic rocket fuel than is considered safe by the EPA.
In the first-ever tests of perchlorate in off-the-shelf supermarket produce, EWG found contamination averaging 4 times more than what the EPA says is safe in drinking water. EWG estimates 1.6 million American women of childbearing age are at risk.