The Washington Aqueduct can add copper sulfate to its treatment process to fight algae issues in the Potomac River, protecting the D.C. area’s main water source.

Now, the Washington Aqueduct, with an additional conduit added in the 1920s, provides water for more than 1 million people in D.C. and parts of Fairfax and Arlington counties in Virginia.

The Washington Aqueduct is sourced by the Potomac River and serves as the public water supply for about one million people in the D.C. area, Arlington County and other portions of Northern Virginia.

WASHINGTON (7News) — A Boil Water Advisory that was affecting all D.C. and some Arlington County residents was lifted early Thursday morning according to DC Water. As of 7:30 a.m., DC Water ...

The Army Corps. of Engineers saw increased cloudiness – called turbidity in technical terms – in water taken from the Washington Aqueduct, which services the District and Arlington County.

The Washington Aqueduct produces an average of 135 million gallons of water per day, supplying drinking water to roughly 1 million people in D.C., Arlington County and other parts of northern ...

Precautionary boil water advisories for Washington, DC, and Arlington County were lifted Thursday morning, after local authorities announced water quality never deviated from safety standards.

In the 1850s, the Army Corps oversaw the development of the Washington Aqueduct to convey drinking water to Washington, D.C., from the Potomac River — and it continues to manage that water ...

A boil water advisory was issued Wednesday night for the entire District of Columbia and Arlington County. The Pentagon, Arlington National Cemetery and Reagan National Airport are also affected.

Precautionary boil water advisories for Washington, DC, and Arlington County were lifted Thursday morning, after local authorities announced water quality never deviated from safety standards.