The Blue Lagoon takes advantage of the unique system of geothermal heated water from a nearby geothermal power plant, allowing it to naturally produce water with medicinal and curative properties. This has lead it to become a much sought after place for travelers in search of wellness and health. The water enjoys a steady temperature of 37-39°C throughout the year thanks to the excess heat produced for the local community of Svartsengi, which is then pumped out into the lava fields, which is how the Blue Lagoon was first created. The water is replenished every 40-48 hours, ensuring its purity and mineral concentration.