Kainamui is situated in Ngariama, a region within the Gichugu division of Kirinyaga County. Established in 1963, it lies on the foothills of Mount Kenya. The Kainamui washing station is home to a community of 2000 members, comprising 1200 men and 800 women. These producers engage in small-scale operations, with each individual typically owning an average of 200 trees.