Table 5.2 Water Activity Water activity, aw Material Examples of organisms 1.000 Pure Water Caulobacter, spirillum 0.995 Human blood Streptococcus, escherichia 0.980 Seawater Pseudomonas. Vibrio 0.950 Bread Most gram-positive rods 0.900 Maple syrup, ham Staphyloccus 0.850 Salami Saccharomyces rouxii 0.800 Fruit cake, jams Saccharomyces bailii, Penicillium 0.750 Salt lakes. salted fish Halobacterium. halococcus 0.700 Cereals, candy dried fruit Xeromyces bisporusTable 5.2 Water Activity Water activity, aw Material Examples of organisms 1.000 Pure Water Caulobacter, Spirillum 0.995 Human Blood Streptococcus, Escherichia 0.980 Seawater Pseudomonas, Vibrio 0.950 Bread Most gram-positive rods 0.900 Maple syrup, ham Staphyloccus 0.850 Salami Saccharomyces rouxii 0.800 Fruit cake, jams Saccharomyces bailii, Penicillium 0.750 Salt lakes, salted fish Halobacterium, Halococcus 0.700 Cereals, candy, dried fruit Xeromyces bisporus