Lake Nokoué lies in the densely populated coastal area of Benin – surrounded by the large cities of Cotonou and the capital Porto-Novo with a total population of over one million. In the middle of the lake is the village of Ganvié, built entirely on stilts - the Venice of Africa.
Unpurified sewage and waste from the urban settlement, pesticides, fertilizers and organic matter all lead to the constant deterioration of water quality in Lake Nokoué and threaten the village population.
Poor hygienic conditions lead to diseases such as diarrhoea, bilharzia and cholera, which kill many children under the age of five. In addition, legislation in the protected area cannot be controlled because of a lack of money and staff.