Protesters Gather at Lincoln Memorial Reflecting Pool Amid Algae Bloom and Security Presence Following Renovation

Washington, D.C. - Demonstrators, including at least one individual in a pink inflatable frog-like costume wearing an "ANTIFA" bandana and waving a "TEAM ALGAE" flag, appeared near National Guard troops and U.S. Park Police patrolling the Lincoln Memorial Reflecting Pool on June 21, 2026.

The gathering highlighted ongoing controversy surrounding the pool, which underwent a multimillion-dollar renovation completed in early June. The project, costing around $14 million (with some reports citing up to $16 million including related contracts), involved applying a dark "American Flag Blue" waterproof coating to the pool's bottom to address longstanding issues with leaks and algae.

Days after refilling, the pool developed a prominent green hue due to an algae bloom, described by officials as "residual" growth from dormant supply lines during construction. Satellite imagery indicated elevated algae levels compared to prior Junes. Workers responded with hydrogen peroxide treatments, ozone nanobubbles, and vacuuming. Peeling of the new coating was also reported.

President Donald Trump attributed the problems to vandalism by "sick, deranged people" and "radical left lunatics," announcing multiple arrests, including a former Olympic canoe racer, David Hearn, charged with misdemeanor destruction of government property after he reportedly touched a loose piece of the coating. Trump administration officials deployed National Guard members and increased Park Police patrols to protect the site ahead of the nation's 250th anniversary celebrations.

"Pro-algae" demonstrators mocked the situation with chants, signs, and costumes, turning the scene into a satirical protest against the renovation and security measures. Some referenced the algae's resilience in skits and blew bubbles to parody the nanobubble treatment.

Experts note that algae blooms are common in shallow, warm, stagnant water like the Reflecting Pool, especially after disturbances such as construction. The site has a history of such issues despite prior maintenance efforts.

As of June 22–23, 2026, patrols and treatment efforts continued while the administration considered further repairs to restore the pool's appearance for upcoming events. No injuries or major incidents beyond the reported detentions were widely confirmed in connection with the protests.