Boil water advisory issued for all of D.C., Arlington County due to algae blooms

A boil water advisory was issued Wednesday night for the entire District of Columbia and neighboring Arlington County due to a spike in algae blooms in the Potomac River, officials said.

The District of Columbia Water and Sewer Authority said the advisory, which it described as "precautionary," also included the Pentagon, Arlington National Cemetery and Reagan National Airport.

"We have no information that the water was contaminated by this incident, but we issue this advisory as a precaution while we test the water," the agency said.