The 4th reflection of the Lenten Campaign: Seven Weeks for Water 2017 of the Word Council of Churches’ (WCC) Ecumenical Water Network (EWN) is by Prof. Jesse N.K. Mugambi, PhD, FKNAS, EBS. Prof. Mugambi teaches at the Department of Philosophy and Religious Studies at the University of Nairobi, Kenya. He is also a Member of the Working Group on Climate Change and is an active member of the WCC’s Ecumenical Water Network. In the following reflection, he meditates on the theme of the World Water Day 2017: “Wastewater”. He asks, “why waste water?” Then he goes on to reflect on the African context: how we can reduce, reuse and recycle fresh water for our consumption. A frugal lifestyle when it comes to water use is the way to go for Prof. Mugambi.