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

picture of damage inside the RCMI

Additional closures of Rock Creek Multi-use Trail will be necessary as part of Phase 1 work

Starting Friday, November 7 at 8 p.m. and continuing through Monday, November 10 at 5 a.m., a section of the Rock Creek Multi-use Trail near Rose Park—between P Street NW and Pennsylvania Avenue NW— will be temporarily closed for construction. This closure is part of ongoing high-priorty repairs to the Rock Creek Main Interceptor (RCMI), a major sewer line which transports more than 100 million gallons of wastewater each day.

Picture of DC Water staff, CEO/GM David Gadis, Mayor Muriel Bowser, DC Water Board Chair Dr. Unique N. Morris-Hughes

Today, DC Water celebrated a major milestone in the Potomac River Tunnel Project with the ceremonial blessing of Mary, the tunnel boring machine (TBM) that will dig the northern leg of the tunnel. The ...

DC Water Cares Logo

In response to the ongoing federal government shutdown, DC Water is reaffirming its commitment to supporting customers facing financial hardship. The utility recognizes the stress and uncertainty this ...

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Picture of DC Water staff, CEO/GM David Gadis, Mayor Muriel Bowser, DC Water Board Chair Dr. Unique N. Morris-Hughes
DC Water Blesses Tunnel Boring Machine “Mary,” Launching Her Historic Underground Journey for Potomac River Tunnel Project

Today, DC Water celebrated a major milestone in the Potomac River Tunnel Project with the ceremonial blessing of Mary, the tunnel boring machine (T

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
November 6, 2025
Thursday, 8:30 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.