Boil Water Advisory Issued for District of Columbia, Arlington County

Algae blooms brought on by high temperatures have prompted water quality concerns.

A man sits in the shade next to the Potomac River during a hot day in Washington, D.C., on Sept. 7, 2023. Mandel Ngan /AFP via Getty Images

A boil water advisory was issued on Wednesday night for the entire District of Columbia due to algal blooms in the Potomac River triggered by high temperatures.

The District of Columbia Water and Sewer Authority (DC Water) said the precautionary advisory encompasses those at the Pentagon, Arlington National Cemetery, and Reagan National Airport.