These are responsible for managing about 138 coffee washing stations dessemitated in the country.
In whole, there are 7 coffee washing sation managing societies. The location of each sogestal coincides with coffee terroirs. Sogestals are named Kayanza, Kirimiro, Kirundo/Muyinga, Ngozi and Mumirwa which are mixed ie state and private joint venture and the two remaining are entirely private owned. These are Sonicoff and Coprotra
They are responsible for buying cherries from growers. Then, they proceed to pulp, ferment , rinse thouroughly coffee and finally operate sun drying down to 12 % moisture content on raised screen beds. The completely washed parchment is known as fully washed resulting from wet processessing.

Mills

The product obtained after the previous process is thereafter moved to warehouses before its transportation to mills for additional process such grading, conditionning, cupping , classification into grades before its packaging in jute bags.
The main private and state company well known as miller is SODECO while Sonocoff and Sivca are private millers.
At each step, quality is controlled and supervised by well trained technicians .
After milling process, green coffee is classified into grades by liquorors of the industry ‘s coordinating and making decision body (OCIBU), then packed and transported to warehouses awainting for sales.