Lead pipes in District of Columbia
District of Columbia's 4 community water systems reported 16,935 lead and 220 galvanized-requiring-replacement service lines, plus 13,427 of unknown material. That ranks #25 among states for confirmed lead lines.
- Lead 12%
- Galvanized (replace) 0.2%
- Unknown 9.7%
- Non-lead 78%
12% of the service lines District of Columbia utilities reported are lead or galvanized requiring replacement, well above the national share of 3.1%. 9.7% are still unidentified (national: 21%). The largest counts are in D.C. Water and Sewer Authority (17,125), Naval Station Washington - Wny (23), Joint Base Anacostia - Bolling (7). 1 systems haven't reported counts yet.
Since 2025 Q1, reported lead and galvanized lines in District of Columbia went from 17,155 to 17,155 (down 0). See which systems made the most progress.
Systems with confirmed lead lines (3)
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| D.C. Water and Sewer AuthorityDistrict Of Columbia County | 16,935 | 190 | 13,388 | 12% |
| Naval Station Washington - WnyDistrict Of Columbia County | 0 | 23 | 4 | 26% |
| Joint Base Anacostia - BollingDistrict Of Columbia County | 0 | 7 | 35 | 0.6% |
Lead pipes in District of Columbia cities
- Washington17,125 lead + galv. lines
All District of Columbia cities and towns · Lead pipes by county
District of Columbia lead pipe questions
How many lead pipes are in District of Columbia?
District of Columbia's community water systems reported 16,935 lead service lines and 220 galvanized lines that must be replaced, for 17,155 in total. Another 13,427 lines are of unknown material.
Which District of Columbia water systems have the most lead pipes?
D.C. Water and Sewer Authority (17,125), Naval Station Washington - Wny (23), Joint Base Anacostia - Bolling (7). Counts are lead plus galvanized-requiring-replacement lines.
What share of District of Columbia service lines are lead?
12% of reported service lines in District of Columbia are lead or galvanized requiring replacement, well above the national figure of 3.1%. 9.7% are still unknown, compared with 21% nationally.
How do I find out if my District of Columbia home has a lead service line?
Search for your water system or ZIP code above, then open your utility's address-level inventory map. You can also check the pipe where it enters your home with a scratch and magnet test.
Source: EPA SDWIS service line inventory, 2026 Q3. Smaller systems with no lead or unknown lines are omitted. See also national rankings.