The Reflecting Pool algae issue in Washington DC has sparked debate after the historic landmark turned bright green just weeks after a major renovation. The pool, located near the Lincoln Memorial, was recently upgraded in a multimillion-dollar project aimed at restoring its iconic blue color. However, the water has now developed visible algae growth and peeling surface material.
Former President Donald Trump said the site had been vandalized and claimed that the changes to the pool were intentional damage. He suggested that unknown individuals may have poured corrosive substances into the water. However, no public evidence has been released to confirm these allegations, and experts have pointed to environmental conditions as a likely cause of the algae bloom.
The Reflecting Pool, built in the 1920s, sits between the Lincoln Memorial and Washington Monument and is one of Washington’s most visited landmarks. It recently underwent a $14.7 million renovation that included repainting the bottom surface in a deep blue color. Officials announced the completion of the project earlier this month.
Shortly after the renovation, visitors began noticing changes in the pool’s appearance. The blue coating on the bottom started to peel away, with fragments floating on the surface. At the same time, the water turned green due to rapid algae growth. Maintenance teams were quickly deployed to treat the water and assess the damage.
National Park Service crews have been using hydrogen peroxide and other treatments to control the algae. Officials also reported the use of nanobubble oxygen technology designed to reduce harmful bacteria and improve water quality. Despite these efforts, the pool has continued to show signs of discoloration and surface deterioration.
Experts say the Reflecting Pool algae issue is not unusual for this time of year. Aquatic ecology researchers note that warm weather, shallow water, and strong sunlight create ideal conditions for algae growth. They also say that recent construction work may have disturbed the water environment, making it easier for algae to spread.
The pool has also become the focus of political debate. Former President Trump said he had inspected the site and described the damage as more extensive than initially reported. He also claimed that individuals responsible for vandalism could face severe legal consequences. Authorities have not confirmed these claims.
Several arrests and citations have been reported in connection with alleged tampering at the site. U.S. Park Police said five people were arrested and five others received federal citations. One of those detained, former Olympic canoeist David Hearn, said he briefly touched peeling material while observing the pool but did not intend to cause damage. He was later released after questioning.
The Reflecting Pool algae issue has also drawn attention to how the renovation was carried out. The project included no bid contracts awarded to private companies for cleaning and coating work. Critics have raised concerns about the procurement process, while officials say the contracts were necessary to complete urgent repairs.
One contractor involved in water treatment has come under scrutiny due to its connections with political donors. However, officials have stated that contracting decisions were made through standard federal procedures. The companies involved have defended their work, saying they specialize in water restoration and surface treatment systems.
Environmental specialists say algae blooms are common in urban water features and are influenced by weather, sunlight, and nutrient levels. They emphasize that even newly renovated water systems can experience temporary imbalances. In this case, they say the combination of construction disturbance and seasonal conditions likely contributed to the problem.
The Reflecting Pool algae issue has now become both an environmental and political topic. While maintenance teams continue efforts to restore the landmark’s appearance, questions remain about the effectiveness of recent renovations. Authorities say further monitoring and treatment will continue in the coming weeks.
The Reflecting Pool remains open to visitors, but officials are closely tracking water quality and surface conditions. Updates are expected as repair efforts continue and investigations into alleged vandalism move forward.
