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. 2014 Aug 12;29(3):250–260. doi: 10.1264/jsme2.ME14031

Table 2.

NASA preflight and inflight acceptability limits for air, water, and surface samples

Sample Air Surface Water
Preflight 300 CFU m−3 Bacteria 500 CFU 100 cm−2 Bacteria 50 CFU mL−1
50 CFU m−3 Fungi 10 CFU 100 cm−2 Fungi No detectable coliforms
Inflight 1,000 CFU m−3 Bacteria 10,000 CFU 100 cm−2 Bacteria 50 CFU mL−1
100 CFU m−3 Fungi 100 CFU 100 cm−2 Fungi No detectable coliforms