Why Dead Sea is salty?
Andrew Mccoy
Updated on January 08, 2026
In the arid low-lying desert, the water that collects in the Dead Sea evaporates more quickly than water in the open ocean, leaving vast quantities of salt behind, the MDSRC explains.
Is the Dead Sea full of salt?
The Dead Sea has a salinity of 33.7 per cent. This is almost 10 times saltier than ordinary seawater. If you evaporated a litre of Dead Sea water, you'd have around 250g of salt left behind, and in the whole of the Dead Sea there are about 37 billion tonnes of the stuff.Why does the Dead Sea get saltier and saltier?
It is nearly ten times saltier than the ocean. Credit: Nadav Lensky/Geological Survey of Israel. Much of the freshwater feeding the Dead Sea has been diverted in recent decades, lowering the sea's water levels and making it saltier than before.When did the Dead Sea become salty?
Lake salinityAs the climate became more arid, Lake Lisan finally shrank and became saltier, leaving the Dead Sea as its last remainder. From 70,000 to 12,000 years ago, Lake Lisan's level was 100 m (330 ft) to 250 m (820 ft) higher than its current level.