Children play in the waters of Lake Xolotlan, also known as Managua Lake, in Managua. The lake, with a surface area of about 1,000 square km, is polluted as it is where sewage from Managua has been dumped since 1920, according to local media. Inter-American Water Day (IAWD), to raise awareness on the importance of water conservation, will fall on October 2.OSWALDO RIVAS/Reuters