Is the Blue Lagoon man made?

Catching a glimpse of the milky-blue water against the black-rock lava fields, it may not come as a complete surprise that the Blue Lagoon is man-made. Runoff water from the nearby Svartsengi geothermal power plant trickles into the lava fields and a blanket of mineral-rich mud lines the foundations of the Blue Lagoon.



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Do you shower after the Blue Lagoon? Yes, you should shower before and after your stay at the lagoon. Guests are required to shower, without their swimsuit, prior to using the geothermal spa. Simply use the showers and soaps available in the changing rooms.

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Regular sampling of this natural resource—which is rich in salt, silica, and other minerals—shows that foreign bacteria do not thrive in the lagoon's ecosystem. Thus, disinfectants such as chlorine are not needed. In essence, the lagoon is a self-cleaning ecosystem.

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No, it is not harmful. Geothermal seawater contains high concentrations of minerals, such as sulfur, silica, and magnesium. While these are great for your skin, they can leave your hair feeling dry and matted.

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Silica—composed of silicon and oxygen—is a constituent compound of lava and merges with geothermal seawater in volcanic aquifers deep underground. When the superheated water reaches the surface and cools, silica molecules are set free, becoming the iconic white mud that is one of Blue Lagoon's hallmarks.

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In fact, you can always touch the bottom of the lagoon standing up, so it is not like a swimming pool. The milky-blue depths aren't clear either, so you only really want to stick your head under the water to keep warm or perhaps wash off your mud mask.

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The water in the Blue Lagoon is heated to around 37-40 degrees Celsius (98-104 F). Due to fluctuations in weather conditions, the precise temperature may change month to month, however you can expect pleasantly warm waters year-round. The sensation is similar to stepping into a hot bath.

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You are welcome to bring your own towel, robe or slippers. However, towels are included in all packages, so there is no need to bring it with you.

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Being in the water while you are menstruating does not put you at ?an increased risk of infection. Also, there are no changes in your body during your period that would make you more susceptible to injury while swimming.

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