McMillan Reservoir
| McMillan Reservoir | |
|---|---|
| Location | Washington, D.C. |
| Coordinates | 38°55′30″N 77°01′02″W / 38.9251°N 77.0173°W |
| Type | reservoir |
| Primary inflows | Washington Aqueduct |
| Basin countries | United States |
| Surface area | 25 acres (10 ha) |
The McMillan Reservoir is a reservoir in Washington, D.C., that supplies most of the city's municipal water. It was originally called the Howard University Reservoir or the Washington City Reservoir, and was completed in 1902 by the U.S. Army Corps of Engineers.