You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is According to the WHO , what is the minimum bacteriological standard for drinking water - and explain in detail?
Must not detect E. coli or thermotolerant bacteria in any 100 ml sample. Total coliform bacteria should be nil in any 100 ml sample Park's Textbook of Preventive and Social Medicine, 25th edition, Page No. 782