Some more
Blue Lagoon
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Water content

It is rich in silica and blue algae. Other content includes salt and sulphur.

Why the water os b;ie

The water appears pale milky blue because the sediment on the lagoon's floor contains blue-green algae.

Water source

A nearby geothermal power plant pumps up lava-heated water from 2,000 meters (5,000 feet) below the surface. That scorching hot water is then used via convection to heat cold spring and glacier melt water for central-heating use in residential and commercial buildings (the plant also generates electricity). The run-off water is then piped into the Blue Lagoon after being blended with cold water to lower its temperature from very hot to warm.

Water freshness

The water in the lagoon is renewed over a 40-hour period.

Water temperature

The lagoon water averages 37°C to 39°C (98°F to 102°F) throughout the year. The air temperature is comfortably warm in the summer, uncomfortably cold in the winter (particularly so when you are in a bathing suit walking from the indoor shower area to the lagoon).

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