District of Columbia Residents: Here's What's in Your Tap Water

June 23, 2010

The District of Columbia Water and Sewer Authority (DC Water) has released its 2009 Annual Drinking Water Quality Report, the most comprehensive drinking water resource delivered to District residents each year. The report provides valuable information about the water flowing from the Potomac River to taps throughout the District. 

"Water is essential to everyday life, and we are committed to delivering high-quality drinking water that is protective of the public's health," said DC Water General Manager George S. Hawkins. "Accurate information empowers people to make important decisions about their tap water. It’s our goal to make sure everyone in the District knows they can be confident in, and proud of, their water supply."

Drinking water quality in the District has met all federal regulatory standards for the past five years, except for a turbidity violation on a single day in 2008. The Drinking Water Quality Report provides information on water quality monitoring, regulated contaminants and how our drinking water compares to federal standards. DC Water conducts more than 30,000 water quality tests each year. 

DC Water is investing its resources in transparent and reliable information about the drinking water it delivers and how water quality can vary among homes. In addition to mandatory monitoring, DC Water conducts voluntary sampling in schools, daycares and customer homes and works closely with residents to address household water issues, such as lead and aging pipes. 

Ensuring high-quality water from the Potomac River to District households and other buildings is a shared responsibility among DC Water, residents, and the Washington Aqueduct (the federal agency responsible for treating the drinking water). DC Water encourages residents to learn about District drinking water and how household plumbing can affect their water. Annual reports, monthly water quality testing results and tips on ensuring water quality are available on the DC Water website at www.dcwater.com. 

For more detailed information, visit http://www.dcwater.com/drinking_water or contact the Water Quality Division at (202) 612-3440.

Latest News

Photo of Potomac River at the overflow location

Hundreds of Sampling Results Confirm Return to Normal Bacteria Levels in Potomac River

DC Water has outlined its next steps to complete the environmental cleanup and its plan for continued water quality monitoring this summer, as part of the ongoing response to January’s failure in the Potomac Interceptor sewer pipeline. The plan, submitted to the Maryland Department of the Environment (MDE), is supported by extensive data from hundreds of samples.

crews removing soil in C & O Canal

Work continues to remove the remaining soil between locks 10 and 12 of the C & O Canal which was used as an emergency bypass while the Potomac Interceptor was repaired. Crews area also removing plants, trees, and shrubs in preparation for the long-term rehabilitation of the Potomac Interceptor.

Placeholder DC Water Image

DC Water has nearly completed construction site preparation for the Piney Branch Tunnel project, including tree removal, and installation of fences, erosion and sediment controls, utilities, and ...

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Placeholder DC Water Image
Piney Branch Parkway Temporary Closure and Relocation

DC Water has nearly completed construction site preparation for the Piney Branch Tunnel project, including tree removal, and installation of fences

Latest Blog Post
A helicopter lowers a drill rig to workers on the Potomac River.
DC Water begins drilling in Potomac River to explore options to rehab underwater sewer line
When one of your major sewer lines runs through the Potomac River, a backhoe and trencher won't do. That's why we've got helicopters carrying a 14-ton drill and workers suspended midair over the Potomac.
Upcoming Meeting

Upcoming Events

May 16
2:00 pm - 6:00 pm
May 20

Customer Service Center Announcement

Payment Plan Incentive: provides a credit back of 50% of the last 3 payments made. Eligible participants are residential customers who have had an outstanding balance for 60 days or greater and with an outstanding balance of $500 or more.