EMERGENCY WATER OUTAGE
Jul 04, 2025 | 10:00 PM

EMERGENCY WATER OUTAGE
Jul 04, 2025 | 06:00 PM

EMERGENCY WATER OUTAGE
Jul 04, 2025 | 05:00 PM

New DC Water project will improve the health of the Potomac River

April 16, 2021
Potomac River

DC Water is beginning a project in Georgetown to provide the area with separate pipes for stormwater and for sewage. Called sewer separation, it keeps stormwater from entering the combined sewer system, which can overflow during rain events due to the larger volume. 

Sewer separation is just one component of the plan to mitigate combined sewer overflows to the Potomac River, and is part of the larger Clean Rivers Project that is cleaning up all three waterways in the District. 

In the Potomac River sewershed, DC Water will use a multifaceted approach to reduce combined sewer overflows (CSOs), which contribute harmful bacteria, trash and other pollutants to the river. In addition to constructing a tunnel, DC Water is using sewer separation to reduce overflows from two CSO outfalls. 

Commenting on the project, DC Water CEO and General Manager David L. Gadis, said, “DC Water’s sewer separation project in Georgetown is an important step in improving the health of the Potomac River. When the Potomac River Tunnel is completed by 2030, these two projects will reduce combined sewer overflows to the river by 92 percent.”

The work includes installation of new sanitary sewers, storm water lines, manholes, sewer laterals, cleanouts and catch basins. DC Water will also relocate existing water mains at two sites along Wisconsin Avenue and 31st Street, NW. Additionally, the existing sewer regulator along the 48-inch Upper Potomac Interceptor will be modified. That work will take place on Water Street, NW, but all work is south of the C&O Canal. Construction begins this May and is slated for completion by September 2022. 

DC Water is hosting a virtual Community Meeting on April 20, 2021 to provide an overview of the project, the construction schedule, and what to expect during construction. Meeting details follow:

Date/Time: Tuesday, April 20, 2021 at 6:30 p.m.
Join the meeting at: https://us02web.zoom.us/j/81741942834
Dial-in option (audio only): 1-301-715-8592 Webinar ID: 817 4194 2834

For more information and a map of the three construction sites, see dcwater.com/sewersep.

Latest News

Picture of slope near Georgetown University

Lane Closure Expected to Impact Commuters from DC, Maryland, and Virginia

DC Water will begin slope stabilization work along Canal Road Northwest starting around mid-August and is needed before ...

Inspection photo inside Rock Creek Main Interceptor

Ramp Remains Closed Pending Further Assessment

DC Water has completed testing of the Rock Creek Main Interceptor—a major sewer line near the P Street NW ramp to Rock Creek and Potomac Parkway—after a ...

Image of woman enjoying the beach with her phone in hand and the words Bill. Click. Pay. With Pay struck out and Play added.

Sign up for eBilling and you could win a $100 bill credit!

DC Water wants you to make the switch to eBilling, it’s fast, easy, and convenient. With just a few clicks, you can manage your water bill ...

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Picture of slope near Georgetown University
DC Water to Begin Slope Stabilization Work on Canal Road in advance of Potomac River Tunnel Project

Lane Closure Expected to Impact Commuters from DC, Maryland, and Virginia

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
Date
August 14, 2025
Thursday, 1:00 PM