Science Has a Name for What’s Plaguing the Reflecting Pool

Donald Trump has a new nemesis, with a name worthy of a supervillain: Scenedesmus.The Reflecting Pool on the National Mall has become the country’s most high-profile science experiment, with workers battling against nature. After a week of combat, they have essentially killed off one type of algae infesting the pool, only to create the conditions for a new type to take over. And Scenedesmus, a genus of green algae nicknamed “Skinny Dead Mouse” by scientists, is now flourishing, according to testing that was run at the request of The Atlantic.The pool, at the moment, looks like a strange bit of modern art. As workers treat different sections, the areas where they succeed in reducing the algae turn lighter shades of green. In some places, the water is relatively clear. In others, it’s an oily sludge. A quick glance, though, is enough to confirm that this is not the American-flag blue it was supposed to be.Over the past few days, I’ve seen baby ducks swim through the pool; National Park Service workers wading around as they try to clean it; small children bending over to touch it. But none of the NPS workers at the site have been able to definitively tell me whether despite all of the algae—some species of which can be toxic—the water remains safe.A spokesperson at the Department of Interior told me “there is ongoing water testing happening,” but would not disclose the results of those tests. Requests to spokespeople at the NPS have gone unanswered. I have been in touch with scientists who have applied for permits to get into the pool and conduct their own tests, but those permits have yet to be granted.With the lack of transparency from the federal government and no clarity on what’s inside that murky water, I decided to dig—or dip—a little deeper myself. So late on Thursday morning, I filled several water bottles from different areas of the pool. Some were fairly clear, while other samples were dark green. My samples were delivered to two different scientists by that