Algae Infestation in the Reflecting Pool Leads to Ongoing Cleanup Efforts

The Reflecting Pool on the National Mall is currently experiencing an algae infestation, specifically a genus of green algae known as Scenedesmus. Workers have been attempting to manage the algae, having eliminated one type only for another to take its place. Testing conducted at the request of The Atlantic indicates that Scenedesmus is now thriving in the pool. The water's appearance varies, with some areas appearing clearer while others are murky. National Park Service (NPS) workers are engaged in cleanup efforts, but there has been a lack of clarity regarding the safety of the water, with ongoing testing being conducted by the Department of Interior. Scientists have expressed concerns about the effectiveness of current treatment methods, which include hydrogen peroxide and nanobubble technology, as they may not adequately address the green algae that are now proliferating. Additionally, the sealant at the bottom of the pool, part of a $16.4 million renovation, is beginning to peel off, raising further concerns about the pool's condition and maintenance.