State rankings
District of Columbia water-system rankings
Lowest-scoring systems in District of Columbia
Ranked lowest score first. Population shown for context.
1 JOINT BASE ANACOSTIA - BOLLING WASHINGTON, DC · ~19,312 served 70 2 Fort Wingate Community Washington, DC · ~550 served 85 3 Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE Washington, DC · ~120 served 85 4 WASHINGTON AQUEDUCT DIVISION. WASHINGTON, DC 100 5 D.C. WATER AND SEWER AUTHORITY WASHINGTON, DC · ~632,323 served 100 6 NAVAL STATION WASHINGTON - WNY WASHINGTON, DC · ~15,690 served 100 7 Wingate Elementary School (New) - BIE Washington, DC · ~800 served 100 8 Eastern Navajo Agency - BIE Washington, DC · ~455 served 100 9 BIE CHEMAWA INDIAN SCHOOL WASHINGTON, DC · ~320 served 100 10 PASCHAL SHERMAN INDIAN SCHOOL WASHINGTON, DC · ~220 served 100 11 Chi Chil Tah Jones Ranch Community School - BIE Washington, DC · ~137 served 100 12 Hanaadli Huerfano Boarding School - BIE Washington, DC · ~65 served 100
Highest-scoring large systems in District of Columbia
Systems serving 10,000+ people with the best scores.
1 D.C. WATER AND SEWER AUTHORITY WASHINGTON, DC · ~632,323 served 100 2 NAVAL STATION WASHINGTON - WNY WASHINGTON, DC · ~15,690 served 100 3 JOINT BASE ANACOSTIA - BOLLING WASHINGTON, DC · ~19,312 served 70
Scores reflect EPA public records (violations, enforcement, PFAS), are system-level, and can’t account for your home’s plumbing. See the methodology.