All District of Columbia water systems

Every District of Columbia community water system on Lead Pipe Map (3), A to Z, with its lead and galvanized line count. Open a system for its full inventory, lead tests and violations.

DJN

D

• D.C. Water and Sewer Authority 17,125 lead/galv.

J

• Joint Base Anacostia - Bolling 7 lead/galv.

N

• Naval Station Washington - Wny 23 lead/galv.

Source: EPA SDWIS service line inventory, 2026 Q3.