Feces Encyclopaedia Brittanica 75% water consists of source 75% water three to eight ounces of solid waste daily 75% water https://www.britannica.com/science/feces among other things among other things https://www.britannica.com/science/feces 100 and 250 grams folks at Britannica https://www.britannica.com/science/feces among other things ID mostly water