Is Washington Tap Water Safe To Drink?

Yes! The tap water is safe to drink.

Tap water in Washington, D.C., is generally safe to drink and must meet U.S. Environmental Protection Agency standards. DC Water treats and tests the water regularly before it reaches homes and businesses.

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Water Sources
Drinking Fountains

Some older buildings may have lead service lines or plumbing, which can affect water quality. To reduce exposure, use cold water for drinking and cooking, flush stagnant water, and use an NSF-certified filter if your property has lead plumbing.

Last checked: 2026-08-31

United States is ranked as number 9 globally with a score of 96.4% in the water quality EPI research conducted by Yale University.

Source of Water in Washington, United States

Washington, D.C.’s tap water comes primarily from the Potomac River. The Washington Aqueduct, operated by the U.S. Army Corps of Engineers, collects and treats the water at the Dalecarlia and McMillan water treatment plants.

After treatment, DC Water distributes the water through the District’s pipe network. The Potomac River watershed extends through parts of Maryland, Virginia, West Virginia, and Pennsylvania.

Washington Drinking Fountains

Public drinking fountains in Washington State and Washington, D.C., generally use regulated public water supplies and are safe when properly maintained. Water providers must meet federal and local drinking water standards, including requirements for bacteria, metals, and other contaminants.

Do not use a fountain marked out of service, visibly dirty, damaged, or covered by a boil-water advisory. Let the water run briefly before drinking, especially if the fountain has not been used recently.

Drinking Water Map

Here is a map showing all the locations of drinking water spots in Washington. You can click on each water drop to open the spot directly in Google Maps for directions. For easy access on the go, download our iOS app to find water fountains nearby.

Nearby Places

About the Author

Hi, I'm Emily Hartman, a researcher and water quality specialist with a background in public health.

I've spent the last few years studying how everyday water systems impact our health, and I'm passionate about making that information clear and useful for everyone.

Safe, clean tap water isn't just my job, it's something I truly care about.

Disclaimer

* The information provided on this website regarding the safety of tap water in Washington is sourced from reputable sources such as the World Health Organization (WHO), local water authorities, and the Environmental Performance Index (EPI) from Yale University. While we strive to ensure accuracy and reliability, it's important to note that water quality can vary over time and may be subject to factors beyond our control. Users are encouraged to verify the current water quality status with local authorities or consult additional resources before making decisions regarding water consumption. We disclaim any liability for actions taken based on the information provided on this website.