Washington, DC vs Washington Navy Yard, DC

When comparing tap water quality between Washington, DC and Washington Navy Yard, DC, Washington currently holds a substantial 16-point lead in average WaterQ score, with a score of 76 out of 100 versus 60 for Washington Navy Yard. Washington, DC carries a B grade while Washington Navy Yard, DC carries a C. A WaterQ score reflects an aggregate of EPA-reported violations, monitoring data, and compliance history across all public water systems serving each city, so a higher score generally indicates fewer recent violations and a stronger compliance record, though it does not guarantee that every tap in the city tests identically.

Washington, DC is the larger of the two, with 662,890 more residents than Washington Navy Yard. Washington is served by 3 public water systems, compared with 1 in Washington Navy Yard — a difference of 2 systems. A larger number of systems often reflects a more fragmented distribution network spanning multiple utilities, suburbs, or rural service areas, while a single large utility serving a big population can benefit from economies of scale in treatment and monitoring, but may also face more complex, aging infrastructure to maintain.

For residents of either Washington or Washington Navy Yard, the most useful next step is to look up the specific water system that serves your address, since city-wide averages combine results from every system in the area. Visit the Washington or Washington Navy Yard city pages below for a breakdown of local systems, recent violations, and contaminant-specific data, or browse WaterQ's contaminants directory to learn what each measured substance means for health.