$14 Million Later, the Lincoln Memorial Reflecting Pool Is Still Green with Algae

What Happened

In April 2026, President Trump declared the Lincoln Memorial Reflecting Pool "filthy" and "disgusting" and ordered a renovation. The National Park Service awarded no-bid contracts to resurface the 2,000-foot-long basin and coat it in what Trump described as "American flag blue." According to NPR's Scott Simon, the president said at the time, "I have a guy who's unbelievable at doing swimming pools."

The project has cost taxpayers more than $14 million as of June 20, 2026.

The pool is green.

The Science Is Not Partisan

Algae has clouded the Reflecting Pool since it was first filled in 1923. It's hydrology. Shallow, still water sitting under direct summer sun in Washington, D.C. creates near-ideal conditions for algae blooms. The warm water, abundant sunlight, and limited circulation make it a petri dish in the open air.

A University of Virginia satellite analysis commissioned by the Washington Post found more algae in the Reflecting Pool this month than at any point in the past five years. That's a measurable, sourced data point, not an editorial judgment.

The Administration's Position

The Interior Department is not conceding the point. Spokesperson Kate Martin said in a statement this week that workers have deployed "a state-of-the-art ozone nanobubbler filtration system" to address the algae. Martin also said, "President Donald J. Trump is an expert builder who has fixed the reflecting pool for good, unlike the failed and extremely costly attempt by Obama and Biden."

This references a major renovation during President Obama's first term that addressed structural sinking and added filtration infrastructure. The current administration's framing positions the new work as a correction of that prior effort.

The Strongest Case for the Project

The Obama-era filtration system did not solve the algae problem permanently, and the pool has remained a recurring maintenance headache for the National Park Service. If the ozone nanobubbler system needs time to take full effect, and if the new basin coating improves long-term water quality, then judging the project as a failure in mid-June, before the July 4th deadline it was designed to meet, could be premature. Infrastructure projects routinely hit snags, and the relevant question is whether the system works over a full season, not whether it works in week three of a D.C. summer.

The satellite data showing this month's algae levels as the worst in five years is a concrete number that predates the July 4th test date. That makes it harder to simply call this a timing problem.

The No-Bid Contract Question

The process used to award the contracts deserves scrutiny independent of the algae results. No-bid contracts are standard procedure under specific federal emergency or urgency thresholds, but $14 million is a significant public expenditure. No investigation has been announced, and no charges have been filed in connection with the contracting process. Whether competitive bidding would have produced a better technical outcome or lower cost is an open question no source in this coverage has answered.

The Interior Department has not disclosed which contractor received the work or the terms of the agreement, based on available reporting.

What the NPR Coverage Gets Right and Where It Stops

NPR's Scott Simon frames this as a lesson in bipartisan humility, that nature doesn't care about party lines. The metaphor is accurate and the science holds. But the piece does not dig into the specific contracting mechanism, the identity of the contractor, or whether the nanobubbler technology deployed has a peer-reviewed track record in comparable applications. Those are the questions that would convert a good column into a full accountability story.

What Comes Next

July 4th is two weeks away. That is the deadline the project was built around, and it is the concrete test the administration has set for itself. If the ozone filtration system does not clear the water by then, Trump's own framing, that he has "fixed the reflecting pool for good," becomes a directly falsifiable claim on the National Mall, in front of cameras, on the country's birthday.

The University of Virginia satellite monitoring is ongoing. If another measurement is taken closer to July 4th, it will either show improvement or it won't. That data, not the press releases from either side, will be the actual record.