According to the WHO, what is the minimum bacteriological standard for drinking water: (A) All the samples should not contain coliform organisms, (B) 3 consecutive samples of water should not contain any coliforms, (C) 3 coliforms in a 100 ml water, (D) 1 coliform in a 100 ml water
Answer is A. (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