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In the coffee industry, the percentage moisture content is one of the most important physical indicators of quality, defining the shelf life and the behavior of the physical and sensory properties of coffee during storage. Water activity (aw) can be expressed as the potential availability of water to participate in different reactions (biochemical, microbiological, physicochemical); the higher the water content, the higher the aw. To determine the water activity value for dry parchment coffee and excelso coffee in samples that meet the required moisture percentage of 10% to 12%, samples from different Colombian origins and processes were obtained. For this purpose, 400 coffee samples were taken: 200 dry parchment coffee samples from Coffee Growers' Cooperatives purchase points and 200 green coffee bean samples of excelso quality from milling facilities. In each case, the moisture percentage was determined according to ISO 6673 standard and water activity at a temperature of 25°C. Dry parchment coffee and excelso coffee with moisture levels within the required range were found to have water activity values below 0.62, making the product less susceptible to most causes of deterioration.