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.

Latest News

Map: Temporary closure of the southbound curb lane on Rock Creek and Potomac Parkway NW

DC CLEAN RIVERS – POTOMAC RIVER TUNNEL PROJECT

Drivers should expect a temporary southbound lane closure on Rock Creek and Potomac Parkway NW between F St and Virginia Ave on Saturday, September 19, and Sunday, September 20, 2026. The closure will be in place from 7 a.m. to 7 p.m. each day, weather permitting.

Map of Potomac Interceptor at MD/DC Line Lane Closure Area

Beginning this week and continuing through the end of September, DC Water may close one lane temporarily between 10 a.m. to 2 p.m. on Clara Barton Parkway at the Maryland - DC border. The closures are ...

Graphic invitation to Community Day on September 19 from 10:30 a.m. t0 3 p.m.

DC Water Opens the West Potomac Park Construction Site to the Public for Tours, Activities and More

Ever wonder what it takes to build a 5.5-mile tunnel beneath the nation’s capital? On Saturday, September 19, DC Water invites the community for a rare opportunity to experience one of the District’s largest infrastructure projects up close and underground.

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Map: Temporary closure of the southbound curb lane on Rock Creek and Potomac Parkway NW
TRAFFIC ADVISORY: Rock Creek and Potomac Parkway Weekend Lane Closure Beginning September 19

DC CLEAN RIVERS – POTOMAC RIVER TUNNEL PROJECT

Drivers should expect a temporary southbound lane closure on Rock Creek and Potomac Parkway NW between F St and Virginia Ave on Saturday, September 19, and Sunday, September 20, 2026. The closure will be in place from 7 a.m. to 7 p.m. each day, weather permitting.

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
September 22, 2026
Tuesday, 9:30 AM

Upcoming Events

Sep 19
Sep 19
Sep 19

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.