Testing Shows Significant Decline in Drinking Water Lead Levels

July 18, 2016

Recent results from DC Water’s required lead testing program mark the lowest lead levels measured in more than a 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 20,000 lead service pipes on public property, representing the removal of nearly 118 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 the service pipe on private property. 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. Drinking water is lead-free when it leaves the treatment plant and travels through the distribution system, but lead can enter the water when it flows through household lead service pipes or plumbing fixtures that contain lead. “DC Water’s top priority is to provide clean, safe drinking water to our customers,” commented Chief Executive Officer and General Manager George S. Hawkins. “The test results show that efforts to control corrosion through treatment are working. At the same time, we must remain vigilant until all sources of lead are removed. To that end, we provide free lead test kits to help customers identify sources of lead in their homes, and help these customers learn how to minimize their lead exposure.” 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 or email leadtest@dcwater.com. 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 2 parts per billion (ppb) for the most recent reporting period, which means that at least 90 percent of the homes that DC Water tested for lead were 2 ppb or less. All samples were 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 important 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). Customers can also use DC Water’s new interactive map at dcwater.com/servicelines to see if their home has lead service lines. 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.

Latest News

Photo of inside Potomac Interceptor at Dulles showing newly lined tunnel

First of four emergency repairs on Potomac Interceptor finished

DC Water has finished the first of four emergency repair projects on the Potomac Interceptor sewer line. Crews completed work today to strengthen a 600-foot section of pipe at Dulles International Airport.

Picture of repaired segment before the geopolymer work and after the work is done

Crews also reach a major milestone near Dulles International Airport as the next phase of repairs begins this week

DC Water has completed the first major step in emergency repairs to a 175-foot section of the Potomac Interceptor near Pennyfield Lock in Potomac, Maryland. Crews added a new, stronger lining inside the pipe after inspections found serious wear and damage. The work is part of ongoing repairs to 1,700 linear feet of pipe near Pennyfield Lock. Work began on Friday to apply geopolymer, a concrete-like material, inside the pipe. With the new lining complete, crews are preparing for the next phase of work for the remainder of the pipe segment.

image of clara barton parkway with lane closure marked in red

Beginning this week and continuing through mid-August, DC Water will temporarily close one lane overnight on Clara Barton Parkway at the Maryland-D.C. border. The closures are needed so crews can ...

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

DC Water Officials with NPS and ANC commissioners doing ceremonial groundbreaking
DC Water Breaks Ground on Piney Branch Tunnel, Final Phase of DC Clean Rivers Project

Today, DC Water broke ground on the Piney Branch Tunnel, the final major tunnel in our Clean Rivers Project. This work will help keep sewage and trash out of local waterways and make Rock Creek, the Potomac River, and the Chesapeake Bay cleaner for our community.

When we finish the Piney Branch Tunnel, it will hold at least 4.2 million gallons of rainwater and wastewater during heavy storms. Instead of overflowing into Piney Branch, that water will go to the Blue Plains Water Resource Recovery Facility, where it will be treated.

Latest Blog Post
Plastic bottles, cups and other floating debris on the surface of the Anacostia River before the Anacostia River Tunnel began operating.
Cleaner Waterways Start With Everyday Choices
Protecting our waterways starts with everyday actions and continues through critical infrastructure designed to keep pollution out of our rivers.
Upcoming Meeting

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.