History

Historical state of Lake Nicaragua: Indigenous tribes of Nicaragua most likely used the lake as a water supply for consumption and cleaning, as well as a food supply. The cities on the eastern shore of the lake have long been used as ports to the Caribbean Sea, as the San Juan River connects the lake to the sea. Before the use of chemicals in agriculture and the development of industry, the ecological state of the lake was very good.

source: http://www.vereinerde.com/