According to the WHO, what is the minimum bacteriological standard for drinking water
(A) All the samples should not contain coliform organisms > All water intended for drinking, E. coli or thermotolerant coliform must not be detectable in any 100 ml sample / bacteria
All the samples should not contain coliform organisms
3 consecutive samples of water should not contain any coliforms
3 coliforms in a 100 ml water
1 coliform in a 100 ml water
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