Friend, when EWG analyzed 31 million water records from across the country, we were shocked at the results. Millions of Americans are unwittingly drinking water that includes an invisible toxic cocktail made up of contaminants linked to cancer, brain damage and other serious health harms.

That’s the bad news. The good news is we’ve created a one-of-a-kind database so you can find out exactly what’s in your tap water and which filters you can use to protect yourself and your family. Take the first step toward safer drinking water by visiting EWG's Tap Water Database and typing in your ZIP code.

Shockingly, EWG analysis found that chemical contaminants in our drinking water could result in more than 100,000 cancer cases per year. The study assessed 22 carcinogenic contaminants found in more than 48,000 community water systems across the country. Watch this short video to find out more about the risks of cumulative exposures to common tap water contaminants.

EWG estimates more than 200 million Americans may have cancer-linked PFAS chemicals in their tap water. These chemicals are used in everything from cookware to food packaging for their nonstick properties. They never break down, which is why they’re called “forever chemicals.”

Think bottled water is a better choice? Think again. Bottled water can be just as contaminated as tap water and comes at a steep environmental cost. See EWG’s top 5 reasons to skip bottled water.

Once you’ve identified the contaminants of concern in your drinking water, make sure you check out EWG’s Water Filter Guide to find the type of filter that works for you and is certified to remove the contaminants in your tap water.

Take your filtered tap water on the go, with EWG’s new Klean Kanteen honoring the new Tap Water Database! If you donate $45 or more to support EWG’s tap water work, we’ll send you one as a thank-you. Hurry – supplies are limited!