A major renovation of the Reflecting Pool on the National Mall has become the subject of growing public criticism after a large algae bloom transformed the waterway beneath the Lincoln Memorial into a murky green expanse, drawing tourists, local residents and television crews to a project intended to showcase infrastructure improvements.

The controversy centers on a $14.7 million overhaul backed by U.S. President Donald Trump, whose administration promoted the renovation as part of broader efforts to upgrade prominent federal landmarks in the nation’s capital. Instead, visible water-quality problems have prompted questions about the project’s execution and maintenance, turning one of Washington’s most recognizable public spaces into an unexpected political flashpoint.

On Monday, visitors arriving at the Reflecting Pool encountered water covered by a substantial algae bloom. The condition altered the appearance of the landmark, which traditionally serves as a visual corridor linking the Lincoln Memorial and the Washington Monument. The pool’s unusual condition quickly became a point of interest for tourists, many of whom stopped to photograph the scene.

The Reflecting Pool occupies a central place in the symbolic geography of the United States capital. Stretching more than 2,000 feet along the National Mall, the water feature has long been associated with presidential ceremonies, national commemorations and public demonstrations. Its image is widely recognized through photographs and television broadcasts of major historical events.

The emergence of algae across the surface has shifted attention away from those historical associations and toward questions regarding project management. Critics argue that the condition of the pool undermines the purpose of a renovation intended to enhance one of the country’s most visited public landmarks.

Among those expressing concern was Washington-based tour guide José Lebron, who said visitors are increasingly focused on the problems surrounding the renovation rather than the historical significance of the site itself.

“He has a contrary of the Midas touch, which is everything he touches becomes crap,” Lebron said while standing near the pool.

Lebron said the Reflecting Pool was originally conceived as a unifying visual element connecting two major monuments and encouraging contemplation within the surrounding memorial landscape.

“The point of visiting the pool is seeing the whole spectacle of the mistake,” he said. “It’s not enjoying what the pool actually is meant for, which is a reflective space.”

The criticism reflects a broader pattern in which infrastructure projects associated with political leaders become symbols of wider debates about governance and public spending. Although technical details regarding the algae bloom have not been fully outlined publicly, environmental experts generally note that algae growth can result from a combination of factors including water stagnation, nutrient concentrations, temperature and maintenance practices.

The appearance of the pool has also fueled commentary on social media, where photographs of the green water circulated widely. Images posted online generated renewed debate over the renovation’s cost and effectiveness, with critics arguing that the project has failed to deliver the visual improvements promised during its planning stages.

Visitors interviewed at the site appeared divided between curiosity and concern. Some viewed the bloom as a temporary maintenance issue, while others regarded it as evidence of deeper problems affecting the project. Television crews and photographers documented conditions throughout the day as tourists gathered along the edges of the pool.

For local guides and historians, the development is particularly significant because of the Reflecting Pool’s role within the broader National Mall landscape. The waterway was designed to complement the monumental architecture surrounding it and provide visitors with a sense of symmetry and perspective. Changes to its appearance can therefore attract attention disproportionate to what might occur at a less prominent public facility.

Lebron said the conversation surrounding the landmark has changed dramatically as a result of the renovation’s difficulties.

“Now we’re not talking about that,” he said, referring to the pool’s historical and architectural purpose. “Now we’re analysing what a bad job it is, how it’s peeling, how the animals are dying, that it’s not a healthy ecosystem, that the algae are blooming.”

The controversy arrives at a time when public scrutiny of federal spending remains high and infrastructure projects are frequently evaluated not only on technical performance but also on their political symbolism. High-profile landmarks often become visible measures of administrative competence because their condition is readily observed by residents, tourists and media organizations.

The Reflecting Pool’s current state has reinforced that dynamic. What was intended to highlight a renovation effort has instead generated headlines focused on maintenance concerns and public dissatisfaction. Critics have increasingly used the pool’s condition as a metaphor for broader questions regarding project oversight and government execution.

Despite the criticism, the site continues to attract visitors from across the United States and abroad. Many tourists arriving at the Lincoln Memorial stop at the Reflecting Pool regardless of its condition, underscoring the enduring significance of the landmark within Washington’s civic landscape.

As public attention remains fixed on the project, officials face growing pressure to address the water-quality issues and restore the pool to the appearance expected at one of the nation’s most prominent memorial sites.

The controversy centers on a federal restoration effort valued at more than $14 million, launched as part of preparations for the United States’ 250th anniversary celebrations. The project sought to transform the Reflecting Pool by introducing a blue-colored lining intended to enhance reflections of the Washington Monument.

Soon after the refurbished pool was unveiled, however, algae growth reportedly turned the water green, prompting maintenance crews to apply chemical treatments. The measures were followed by reports that sections of the blue coating began peeling from the bottom and sides of the pool, drawing public attention and media scrutiny.

In posts on his social media platform, Trump alleged that vandals had damaged both the pool and surrounding grounds. He claimed that grass near the site had been destroyed and that individuals had attempted to damage the newly installed interior surface.

Federal agencies responsible for maintaining and securing the National Mall, including the U.S. Park Police, the National Park Service and the Department of the Interior, did not immediately respond to requests for comment regarding the allegations.

Trump later stated that Park Police had arrested multiple individuals in connection with vandalism at the Reflecting Pool, describing the incidents as serious crimes involving national monuments. No official details regarding arrests or charges were released.

One individual identified as having been detained was David Hearn, a 67-year-old resident of Bethesda, Maryland, and former Olympic canoe racer. Hearn told The Associated Press that he stopped at the Reflecting Pool during a bicycle ride and briefly touched a section of the peeling coating to examine its texture.

According to Hearn, he immediately withdrew after being instructed by a park employee but was subsequently detained by National Guard personnel and Park Police for approximately five hours before being released. He said he had been ordered to appear in court next month.

Hearn denied causing damage to the site, describing himself as a curious visitor interested in observing the renovation work. He said the material he touched appeared soft and rubber-like.

The reported detention came as public attention focused on visible deterioration at the recently refurbished pool, including algae accumulation and peeling sections of the blue lining. The causes of those issues have not been officially determined.

Trump also suggested that unidentified individuals may have used chemicals to damage the site, drawing a comparison to a separate incident involving discolored grass on the National Mall where the numbers “86 47” appeared. Authorities have said they are investigating that matter, which some interpreted as a reference to the 47th president.

The Reflecting Pool project has faced increasing scrutiny in recent days as images of maintenance crews removing algae and addressing surface damage circulated widely, raising questions about the effectiveness and durability of the renovation effort.

The event, scheduled on the National Mall as part of commemorations marking the 250th anniversary of the United States, will feature speeches from Defense Secretary Pete Hegseth, Secretary of State Marco Rubio and House Speaker Mike Johnson. Trump is expected to address attendees through a video message.

In a promotional video released ahead of the gathering, Hegseth described the event as an opportunity to “rededicate this republic to God and country,” language reflecting the increasingly visible role of conservative evangelical movements within Trump’s political coalition.

The prayer rally comes as Christian nationalism has gained greater prominence during Trump’s second term, with evangelical voters remaining a central pillar of Republican support.

Critics argue the administration has increasingly blurred the boundary between religion and state despite constitutional protections designed to prevent the establishment of an official religion.

While faith-based events involving presidents and government officials are common in Washington, scholars said Sunday’s gathering stands out because of its scale and the extensive participation of senior cabinet officials.

According to organizers, the event is open to Americans “of every background.” However, nearly all of the listed religious speakers are evangelical Protestant leaders, alongside a rabbi and a retired Catholic archbishop.

Religious studies experts said the composition of the event reflects a broader political movement linking conservative Christianity with national identity.

Sam Perry, a professor at Baylor University, said the blending of conservative Christianity and nationalism is not unprecedented in U.S. politics but noted the White House’s direct role in organizing the event marked a departure from earlier administrations.

Julie Ingersoll, a religious studies scholar at University of North Florida, said the speaker lineup projected a vision of American identity centered on Christianity and traditional cultural majorities.

The event is also expected to reinforce the influence of televangelist Paula White, who leads the White House Faith Office and has long served as one of Trump’s closest spiritual advisers. In a webinar last month, White described the gathering as a moment to “rededicate the country to God.”

The National Mall has historically served as a venue for major demonstrations and public assemblies, including the 1963 March on Washington where civil rights leader Martin Luther King Jr. delivered his “I Have a Dream” speech. Organizers said Sunday’s program is expected to run for approximately nine hours.