The National Park Service (NPS) has begun treating the Lincoln Memorial Reflecting Pool with hydrogen peroxide to combat algae growth, following a multimillion-dollar renovation. The pool, which reopened after an $14.2 million renovation, turned green due to algal buildup, prompting the agency to use a combination of hydrogen peroxide and nanobubble technology to clear the water.
Immediate Action & Core Facts
The NPS confirmed the use of hydrogen peroxide, a milder treatment than chlorine, to kill algae in the pool. The agency also deployed nanobubble technology, which produces oxidizing agents to break down algae cells. The Interior Department stated that the treatments are safe for the environment and marine life.
Deeper Dive & Context
Renovation and Algae Issues
The Reflecting Pool underwent renovations to fix leaks and improve water quality, with President Donald Trump previously describing the pool as "filthy" before the upgrades. The renovation included the installation of advanced nanobubble technology, which has been tested and validated by NOAA and other institutions. Despite the upgrades, algae has been an ongoing issue in the pool since its opening in 1922, exacerbated by the hot and humid climate in Washington, D.C., and the pool's shallow, stagnant design.
Treatment Methods
The hydrogen peroxide used is a 12% concentrated formula, deemed safe for use around people and pets when used as directed. However, the Occupational Safety and Health Administration (OSHA) warns that the chemical can cause skin burns, eye damage, and respiratory irritation if mishandled. The NPS has stated that the algae is being vacuumed up as part of the cleanup process.
Public and Political Reactions
Some visitors to the Reflecting Pool did not mind the green hue, while others expressed concern over the algae's return. The Interior Department emphasized that the pool would be maintained to ensure clean, oxygenated water. Environmental scientists have noted that controlling algae entirely may be difficult, even with the new technology.
Long-Term Implications
The NPS has stated that the nanobubble technology and hydrogen peroxide treatments are part of a long-term solution to keep the pool clear. The agency has also noted that the algae issue is not unique to the current administration, as it has been a recurring problem for decades.