Hundreds of millions of liters of effluent are discharged into the rivers of Ethiopia’s Sidamo region during coffee processing without adequate waste water management. This polluted water then becomes source water for communities and wet mills downstream. The problem has become so acute that legislation was passed to prevent new wet mill construction within five kilometers existing wet mills. TechnoServe is currently working with 10 Sidamo wet mills to implement appropriate water purification solutions, from constructing shallow evaporation lagoons to installing grass-based wetland treatment systems. TechnoServe will support an additional 20 wet mills implement sustainable water management practices over the next two years.