These buildings that you see along the Potomac are more than just buildings-they are odor control facilities. These facilities draw odorous air from the Potomac Interceptor, pass the air through a media-filled vessel to remove the majority of odors, and discharge the treated air to the atmosphere.

In Northwest, DC, at Canal Road and Reservoir Road

On Clara Barton Parkway in Bethesda, Maryland, adjacent to the Little Falls Pumping Station

On Clara Barton Parkway in Cabin John, Maryland, east of I-495

On MacArthur Boulevard in Potomac, Maryland, adjacent to the Old Angler's Inn

In the Great Falls area of Fairfax County, Virginia.

Within Algonkian Regional Park in Loudoun County, Virginia