Not so long ago, the rainy season was a dreaded period for Naomi Nduta and other residents of the Kiwanja Ndege informal settlement in Naivasha, more than 70km northwest of Nairobi.
The waste from the full latrines would flow into the rivers following a heavy rains, often leading to outbreaks of diarrhoea and cholera. “My baby used to suffer from frequent stomach aches and diarrhoea,” said Ms Nduta, a mother of three whose house stands a few metres from a large dumpsite littered with waste paper bags.