Testing Shows Significant Decline in Drinking Water Lead Levels

March 16, 2015

DC Water reminds customers that lead sources are different in each property and urges residents to eliminate lead pipes and plumbing materials in their homes. Recent results from the utility’s required lead testing program mark the lowest lead levels measured in the last decade. Levels have continued to decline since 2004, when the water treatment process began including a corrosion control additive to reduce lead release in water. Since 2003, DC Water has replaced more than 19,000 lead service pipes on public property, representing the removal of nearly 115 miles of lead pipes that connect public water mains to household plumbing. DC Water replaces lead service pipes during water main upgrades or when customers choose to replace their portion of pipe on private property.

Drinking water is lead-free when it leaves the treatment plant and travels through the distribution system, but lead can dissolve when the water comes in contact with household lead service pipes or plumbing fixtures that contain lead. “We take our customers’ health very seriously,” commented Chief Executive Officer and General Manager George S. Hawkins. “We provide free lead test kits to help customers identify sources of lead in their homes, and we strongly encourage our customers to contact us for guidance on the removal of lead sources.” When samples have elevated levels of lead, DC Water offers a plumbing inspection and more extensive testing at no charge. To order a free lead test kit, customers can contact the Drinking Water Division at 202-612-3440.

In addition to the voluntary lead testing program, DC Water tests more than 100 homes across the city every 6 months. This testing is required by the U.S. Environmental Protection Agency (EPA) Lead and Copper Rule and results show that measured concentrations have reached historically low levels. The 90th percentile was 4 parts per billion (ppb) for the most recent reporting period, which means that at least 90 percent of the homes that DC Water tested were well below the EPA’s action level of 15 ppb. For more information about DC Water’s voluntary and required lead testing programs, visit www.dcwater.com/lead.

IMPORTANT CUSTOMER INFORMATION:

DC Water’s required lead monitoring program only measures the lead level in a fraction of District households, so it is critical that customers determine if there are any sources of lead in their homes. For tips on removing lead sources, download the DC Water brochure, Tips to Reduce Lead in Drinking Water (link provided below).

If you have any questions about lead in drinking water, please contact the Drinking Water Division at 202-612-3440 (Monday through Friday, 8 a.m. to 4:30 p.m.). All other questions or suggestions should be directed to DC Water Customer Service at 202-354-3600 (Monday through Friday, 8 a.m. to 5 p.m.) or the 24-Hour Command Center at 202-612-3400. Information is also available at www.dcwater.com/lead/minimizing.cfm.

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Image of overflow from the collapse site being captured by the trench system and returned to the Potomac Interceptor

Pumping capacity remains a challenge, due to ongoing maintenance and operational issues. An overflow occurred late Monday night, when two pumps – clogged with non-disposable wipes – were taken out of service for cleaning and maintenance. During a period of high flow, the volume of wastewater temporarily exceeded pumping capacity resulting in the overflow.

The overflow did not enter the Potomac River and was contained on-site by an earthen dam and a trench system that captured and redirected the wastewater back into the sewer system.

Image of pump with a large pile of wipes next to it that clogged the pump and had to be removed

DC Water and its contractors continue working around the clock, to operate, clean and maintain bypass pumps that divert wastewater around the damaged section of the Potomac Interceptor and return flows into the system further downstream. Despite these efforts, a significant overflow occurred late Sunday.

Placeholder DC Water Image

DC Water is taking emergency measures with the immediate and ongoing closure of all northbound lanes of 14th Street between L Street NW and Thomas Circle, due to the imminent risk of collapse posed by an abandoned, century-old, brick-lined sewer tunnel beneath the roadway.

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Picture of new bike pedestrian path and traffic detour
New Path for Capital Crescent Trail Opens at Georgetown Waterfront Park

DC CLEAN RIVERS – POTOMAC RIVER TUNNEL PROJECT
If you bike, drive, or walk through Georgetown, we’ve got changes starting this week around the Potomac River Tunnel construction on Water Street NW. The Capital Crescent Trail has a new temporary detour through Georgetown Waterfront Park, open now for cyclists between 33rd and Potomac streets NW.

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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
February 19, 2026
Thursday, 9:30 AM

Upcoming Events

Customer Service Center Announcement

Payment Plan Incentive: provides a credit back of 40% of the last 3 payments made and in the new fiscal year 50% will be credited. 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.