National Drinking Water Database

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National Drinking Water Database - Find Your Water

What's in your water?

December 2009

We have compiled almost 20 million records obtained from state water officials to make it easier for you to find out what is in your water. Throughout the country, we have found 316 chemicals in tap water.

Curious about what is in your local water supply?

If you're thinking "I want to know what's in MY tap water!" then simply search using your zip code on the search box above. You'll then be asked to select your local water utility (more than one utility often serves a single zip code).

Once you discover what chemicals are in your local water supply, visit EWG's online water filter guide to pick a filter that will reduce your exposure to those chemicals.