Fall Leaves and Low Water in Potomac River May Affect Tap Water Taste and Odor

November 28, 2007

The District of Columbia Water and Sewer Authority (WASA) has received several recent complaints about the taste and odor of tap water. Water quality officials say this is a temporary, non-health threatening issue likely due to the deterioration of fall leaves and the low water levels in the Potomac River, the Districts drinking water source.

WASA purchases drinking water from the U.S. Army Corps of Engineers Washington Aqueduct and distributes it throughout the District of Columbia.

"The degradation, or breakdown, of the acid in the leaves produces an earthy odor," explains Aqueduct General Manager Thomas Jacobus. "This years water levels have been very low, without a lot of rain and fresh water to push along the decaying leaves."

A few heavy rainstorms, Jacobus says, should solve the problem. In the meantime, the Aqueduct is adding activated carbon to its treatment process to absorb the odor.

"This is an aesthetic issue and an important one, but not a health problem," Jacobus says. "The Aqueduct and our customers at WASA and in Arlington and Falls Church will continue to carefully monitor the water quality so we can make any adjustments necessary to assure that the taste and odor issues are resolved."

Water quality concerns may be addressed by calling the Washington Aqueduct at 202-764-0019 or WASA at 202-612-3400.

Latest News

DC Water team on stage receiving Merit Award from DBIA during awards ceremony

DC Water is being honored with a national award from the Design-Build Institute of America (DBIA). The award recognizes DC Water for its rehabilitation of a critical section of the Potomac Interceptor ...

Photo of workers on M St doing repairs

On Thursday, November 5, beginning at 9 p.m., DC Water will be doing valve repair work involving lane closures and potential delays along M Street NW in Georgetown. Crews will replace one large valve ...

Map of lane closure inbound on Clara Barton Parkway

Drivers should expect periodic traffic delays midday and overnight on Clara Barton Parkway at the Maryland-DC border through December 23, 2026, as DC Water works to complete emergency repairs on the ...

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Christening of TBM Emily with DC Water Interim General Manager Matt Brown holding bottle of tap water to christen Emily
DC Water Welcomes the Community Underground to See the Potomac River Tunnel and Christens Tunnel Boring Machine Emily

DC Water celebrated the christening of Emily today. It’s the second giant tunnel boring machine (TBM) that will help build the 5.5-mile Potomac River Tunnel. The celebration continued with Community Day. Residents and families met Emily and stepped inside the tunnel where she will soon begin digging.

Latest Blog Post
Emergency supplies arranged on a table, including bottled water, canned food, a backpack, first aid kit, flashlight, phone, medication and other essential items.
Simple Ways to Stay Prepared at Home
A few simple steps can help your household prepare for severe weather and temporary water or sewer service interruptions.
Upcoming Meeting
Date
November 12, 2026
Thursday, 9:30 AM

Upcoming Events

Nov 12
6:30 pm - 7:30 pm

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.