Washington, D.C.

Washington, D.C. drinking water quality

Every public water system in Washington, D.C. we've verified. Each report covers one calendar year and shows the utility's own measured contaminant levels against federal limits.

Want the national picture? See where Washington, D.C. lands in our ranking of the states with the most open health-based water violations, pulled from the EPA's own records for every U.S. public water system.

5 water systems mapped in Washington, D.C.

Browse all 5 systems A–Z:1

• Washington Aqueduct Division. (1992)
  1 contaminants measured· 1 at or above the limit
• Joint Base Anacostia - Bolling (2024)
  1 contaminants measured
• D.c. Water and Sewer Authority (2025)
  1 contaminants measured
• Naval Station Washington - Wny (2023)
  1 contaminants measured
• Naval Observatory (2023)
  1 contaminants measured