It is situated to the north west of Istanbul and its distance to the city is 40 kilometres (25 mi).

[3] Lake Durusu was originally a lagoon and it is separated from the Black Sea coast by a 700 metres (2,300 ft) wide strip.

[4] The annual water supply capacity of the lake is 162×106 cubic metres (5.7×109 cu ft).

In 1868 the concession of the lake and its environment was granted to an Ottoman - French company.

The researches showed that lake Durusu is a drinking water source.