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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.

Drinking Water

Research Content

Drilling Around the Law

» Read more... | Published January 11, 2010

EWG Warns of Drilling Threat to NYC Drinking Water

EWG Testifies Before NYC Council
» Read more... | Published October 28, 2009

Bottled Water Quality Investigation: 10 Major Brands, 38 Pollutants

Bottled water contains disinfection byproducts, fertilizer residue, and pain medication
» Read more... | Published October 15, 2008

Trouble Downstream: Upgrading Conservation Compliance

EWG asks Congress to require more environmental protection from farmers in exchange for federal farm subsidies.
» Read more... | Published September 4, 2007

Fluoride in Southern California Tap Water

The Southern California Metropolitan Water District’s plan to fluoridate drinking water, beginning in October, would expose more than 64,000 children to fluoride in excess of government safety limits.
» Read more... | Published August 16, 2007

Chlorine Pollutants at High Levels in DC Tap Water

New tests find high levels of hazardous chlorination byproducts in D.C. tap water
In spite of the best efforts of the Washington Aqueduct, tap water tests by EWG from May 2007 reveal toxic by-products of the chemicals used to purify Potomac River water at levels above annual federal health limits. Read the Washington Post story.
» Read more... | Published July 19, 2007

Water pollution caused by cosmetic chemicals, cleaning supplies and plastics

Sources of Hormone-Disrupting Chemicals in San Francisco Bay
An EWG study finds that 95 percent of wastewater samples draining into San Francisco Bay show widespread use of hormone-disrupting chemicals. Read the SF Chronicle story, "Danger Feared from Chemicals Getting into Bay."
» Read more... | Published July 11, 2007

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.
» Read more... | Published April 10, 2006

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.
» Read more... | Published December 20, 2005

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.
» Read more... | Published June 26, 2005
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