What is a washing station in coffee production?

A washing station - also called a wet mill, a factory in East Africa, or a beneficio in Latin America - is a centralised processing facility where freshly harvested cherry is brought for initial wet processing: sorting, pulping, fermentation, washing, and drying.

In origins where most coffee is produced by smallholder farmers, the washing station is the critical quality hub. Rather than each farmer processing their own cherry, producers deliver to the central station where it's processed collectively. The quality of that management - cherry sorting at intake, fermentation time control, water quality, drying supervision - determines the cup quality of the resulting lots.

In Kenya and Rwanda, washing station identity is central to how specialty coffee is traced and priced. A specific station's lot may command a premium based on the reputation that station has built over years of consistent management. Names like Gichatha-ini, Kagumoini, and Kilimbi aren't just geographic labels - they're quality signals with meaning to buyers who've tasted the lots they produce.