Science
Reflecting Pool Treatment Fails to Meet Expectations
The Lincoln Memorial Reflecting Pool remains green despite efforts to turn it blue. A water treatment expert explains the challenges in achieving the desired color and why the algae problem persists.
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Scientific American
The Trump administration wanted the surface of the Lincoln Memorial Reflecting Pool to be “American flag blue.” A water-treatment expert explains why the pool is still algal green and why the bloom could keep coming back
2026-06-19 22:00 UTC