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BackLincoln Memorial Reflecting Pool Turns Green Despite $14 Million Renovation
Lincoln Memorial Reflecting Pool Turns Green Despite $14 Million Renovation
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NPR News6/20/2026Politics2 min readUnited States

Lincoln Memorial Reflecting Pool Turns Green Despite $14 Million Renovation

Quick Look

  • Despite a $14 million renovation authorized by President Trump to fix the Lincoln Memorial Reflecting Pool, it has turned green due to algae blooms.
  • This issue has persisted since 1923, but recent analysis shows more algae than in the past five years.
  • The Interior Department claims a new filtration system is in place.

AI-generated summary

Why It Matters

The Lincoln Memorial Reflecting Pool has been a site of historical events and gatherings for over a century. Algae blooms have been a recurring issue since its construction in 1923.

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The Lincoln Memorial Reflecting Pool has witnessed more than a century of American history, in all its heartbreak and majesty. Crowds have gathered around it in protest and in praise to denounce American wars, and hear great voices sing and speak.

Today, it's the center of a slimy controversy.

President Trump said in April he found the water in the reflecting pool "filthy" and "disgusting." He authorized a no-bid contract to resurface the basin of the 2,000-foot long pool, and paint it "American flag blue" in time for July 4th celebrations.

"I have a guy who's unbelievable at doing swimming pools," the president crowed, before the National Park Service gave out no-bid contracts for sealing and upgrades.

After weeks of renovation, the project has cost taxpayers more than $14 million and… the reflecting pool looks green. And I mean green. Like the Chicago River on St. Patrick's Day. But that river is dyed green for a day. The Lincoln Memorial Reflecting Pool is green because of algae.

Look, algae happens. It's clouded the reflecting pool since it was first filled in 1923. Algae blooms flourish when sunlight falls on warm, sluggish water — like you'd find in a shallow, still pool absorbing the glare and swelter of a Washington D.C. summer.

But a University of Virginia satellite analysis commissioned by the Washington Post saw more algae in the Reflecting Pool this month than at any other time in the past five years.

The Interior Department says workers have deployed "a state-of-the-art ozone nanobubbler filtration system" to banish the algae.

"President Donald J. Trump is an expert builder who has fixed the reflecting pool for good," spokesperson Kate Martin said in a statement this week, "unlike the failed and extremely costly attempt by Obama and Biden."

That's a reference to a major project during President Obama's first term to stop the pool from sinking and add a filtration system.

In these deeply divisive and partisan times, it's good to remind ourselves that many issues aren't just Republican red or Democratic blue. The Reflecting Pool algae doesn't care about our party lines. It's green, and it's not going anywhere.

Open Questions

  • Will the new filtration system effectively combat algae?
  • What is the long-term plan for pool maintenance?
  • Will there be further investigations into the contract and cost?

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This article was originally published by NPR News.

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