Water is one of the indispensable resources for the continued existence of all living. Things including man, however in recent periodconsumption of drinking water contaminated with faecal originated pathogenic bacteria have increased which is responsible for the onset of water borne disease with outbreaks especially in developing countries. In the present study for a period of one year, 253 drinking water samples from different mandals in Vizainagaram district, Andhra Pradesh were assessed for the bacteriological quality and pot ability.