Trump's $14 Million Lincoln Memorial Pool Renovation Is Turning Green With Algae

One of the most photographed landmarks in the United States has turned an embarrassing shade of green — and the federal government is pointing fingers at vandals rather than at a costly renovation that experts say may have made the problem worse.

The Lincoln Memorial Reflecting Pool, a 2,000-foot-long basin that stretches between the Lincoln Memorial and the Washington Monument and has graced countless postcards, protest marches, and presidential inauguration photos, is developing a stubborn algae bloom. The timing is awkward: the bloom arrived months after the Trump administration completed a high-profile, $14 million project to beautify the National Mall, which included repainting the pool's interior in a color officials called "American flag blue."

What went wrong

Pool chemistry experts say that repainting a large water feature with new coatings can alter the pH balance of the water in ways that promote algae growth — particularly when combined with warm summer temperatures and high sunlight. The Lincoln Memorial Reflecting Pool is a shallow, open basin with no significant shade, making it especially vulnerable during Washington's humid summer months.

The $1.7 million water-cleaning contract — awarded to a company owned by a donor to President Trump, according to federal records reviewed by journalists — was meant to address exactly these kinds of water-quality issues. Its apparent failure to prevent the bloom has raised questions about the procurement process and whether the contractor had the technical expertise required for a project of this visibility.

The vandalism arrests — and Trump's response

Complicating the picture is a separate but concurrent controversy: multiple people were arrested this weekend for allegedly vandalizing the Reflecting Pool, including at least one former Olympic athlete. President Trump responded by blaming the pool's condition primarily on the vandalism rather than the renovation, calling for the basin to be drained and threatening "serious consequences" for those charged.

National Park Service officials confirmed to reporters that the green coloration is an algae bloom — a biological phenomenon — and is distinct from any vandalism. NPS employees were photographed over the weekend using industrial vacuums to clean algae from the pool's surface, an unusual sight at one of the most visited public spaces in America.

The broader context

This is not the first time the Reflecting Pool has faced algae problems. A major 2012 renovation by the National Park Service — the last major overhaul before this one — specifically addressed long-standing water quality and drainage issues. Critics of the current renovation argue the 2012 system was working adequately and question whether the latest overhaul was necessary at the cost taxpayers are now bearing.

What happens next

The National Park Service has not provided a public timeline for resolving the algae bloom. Draining the pool, as Trump has suggested, would require significant logistical coordination and could take days or weeks, potentially disrupting the pool's visibility during the lead-up to July 4 — when millions are expected on the National Mall to celebrate the United States' 250th anniversary.

For now, visitors to the National Mall are greeted with an unusual sight: one of the country's most iconic landmarks reflecting not a crisp blue sky, but a murky green film that has quickly become the subject of viral social media posts and late-night comedy segments.

Why we're calling this 'developing'

We label a story 'developing' when key facts are still being verified, official statements are still being issued, or the situation on the ground is actively changing. Federal contracting details, the precise cause of the algae bloom, and the timeline for any remediation are all still emerging. Take the current text as a snapshot, not a final account, and check back for updates rather than relying on the first version of the story you saw.

How we're reporting this story

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