Potable water is defined as :-: (A) Zero coliforms per 100 ml, (B) One coliform per 100 ml, (C) 10 coliforms per 100 ml, (D) 100 coliforms per 100 ml
Answer is A. - Drinking water, also known as potable water, is water that is safe to drink or to use for food preparation. - 'Potable water' is defined as: zero coliforms in any amount of drinking water. - Bacteriological indicators of water quality in India: Coliforms -Overall best indicator. Fecal streptococci - Indicate recent contamination of drinking water. Clostridium perfirenges - Indicate remote contamination of drinking water.