Research

The Maumee River, overloaded with fertilizer and manure, is the single largest source of the phosphorus that triggers blooms of toxic algae in Lake Erie. Over half of the manure in the Maumee River...

Seasonal spikes of atrazine, a weed killer that disrupts hormones and harms the developing fetus, contaminate the drinking water of millions of Americans at potentially hazardous levels as run-off...

In 2010, there were just three reports of toxic blooms in the U.S. In 2015, there were 15, including the largest to date in Lake Erie, although the bacteria did not get into Toledo's drinking water...

Drinking water for more than 170 million Americans contains radioactive elements at levels that may increase the risk of cancer, according to an EWG analysis of 2010 to 2015 test results from public...

An industrial solvent classified as a likely carcinogen, which is also a common impurity in cosmetics and household cleaners, was detected in samples of drinking water supplies for nearly 90 million...

Toxic pollutants in drinking water are particularly hazardous for children. Compared to adults, children drink more water per pound of body weight, resulting in greater exposure and greater risk. They...

When it comes to drinking water, getting a passing grade from the government does not mean water is safe.

TCP is just one example of the widespread contamination of drinking water from agriculture chemicals.

Every time they drink a glass of tap water, people in the mid-Ohio River Valley of West Virginia and Ohio may be consuming unsafe amounts of an industrial chemical linked to cancer, birth defects...

The reality is that the nation's primary prairie and wetlands protection program – the USDA's Conservation Reserve Program (CRP) – was not designed to meet the environmental challenges being created...

What is most important to you in a water filter? Check out EWG's Water Filter Buying Guide. Find the right filter for your water - and budget.

Across the nation, chlorine, added as a disinfectant to kill disease- causing microganisms in dirty source water, is reacting with rotting organic matter like sewage, manure from livestock, dead...

Water that runs off fields treated with chemical fertilizers and manure is loaded with nitrogen and phosphorus, two potent pollutants that inevitably end up in rivers and lakes and set off a cascade...

Pure, clean water. That's what the ads say. But what does the lab say? When you shell out for bottled water, which costs up to 1,900 times more than tap water, you have a right to know what...

EWG's study of chromium-6 contamination in tap water is not the first to attempt to assess chromium-6 pollution across the country.

Laboratory tests commissioned by EWG have detected hexavalent chromium, the carcinogenic “Erin Brockovich chemical,” in tap water from 31 of 35 American cities. The highest levels were in Norman, Okla...

EWG science review of fluoride and dental health, and why dogs might be at risk from high-fluoride diets.

When you want to know what's in your tap water, look at your local water utility's website. You'll find the source of the water and any chemical pollutants remaining after treatment.

In its final days, the Bush administration appears poised to issue an emergency health advisory for tap water polluted with the toxic Teflon chemical PFOA (perfluorooctanoic acid) effectively allowing...

The bottled water industry promotes an image of purity, but comprehensive testing by the Environmental Working Group (EWG) reveals a surprising array of chemical contaminants in every bottled water...

EWG analysis of Metropolitan Water District fluoridation plans, and potential risks to children's health.

In spite of the best efforts of the Washington Aqueduct to provide quality drinking water to the District of Columbia, tap water tests from May, 2007 revealed toxic by-products of the chemicals used...

A consulting firm hired by Pacific Gas & Electric Co. (PG&E) to fight the "Erin Brockovich" lawsuit distorted data from a Chinese study to plant an article in a scientific journal reversing the study...

Consumers instantly recognize them as household miracles of modern chemistry, a family of substances that keeps food from sticking to pots and pans, repels stains on furniture and rugs, and makes the...