9 Amazing Facts About The Blue Lagoon - #6 Will Shock Even Icelanders!

FrostedHarbor Updated: 2025-07-30

6. The Mysterious Self-Cleaning Phenomenon

Amazing even Icelanders is this fact. The only geothermal spa available worldwide that totally cleans itself every forty hours without human involvement or chemical treatment is the Blue Lagoon. The water runs through porous lava rock, which works as a natural purifier, in a natural filtration system, thereby cleansing this self. Silica, minerals, and helpful bacteria taken together form an environment hostile to pathogenic bacteria. Although this phenomena has long been seen by scientists, their complete understanding of how this ideal natural cleaning system sustains itself is yet lacking. This self-cleaning procedure depends much on the unusual chemical makeup of the water, which includes high silica concentration and ideal pH level. Furthermore keeping the lagoon clean is the continuous supply of new geothermal water. Due in great part to this amazing quality, environmental experts all around have been drawn to study it. Beyond the Blue Lagoon specifically, this self-cleaning mechanism has possible uses in sustainable resource management and water treatment. Scientists and engineers are looking at means to mimic this natural process in different environments, hence transforming water purification methods.