The primary requisite for good health is an adequate supply of water having satisfactory sanitary quality. Water acts as a vehicle for the spread of some specific diseases and may be contaminated with the disease organisms. Other impurities such as dissolved minerals and heavy concentrations of decaying organic matters may also find their ways into a water supply, making water unattractive, harmful or otherwise unsuitable for domestic use. Water containing harmful bacteria and constituents in excess of its permissible values, may cause diseases like cholera, dysentery and typhoid fever and therefore, the quality, of water should be checked before it is supplied to the public. An experimental investigation was undertaken to study the drinking water quality at Peshawar. Water samples from various tube wells were collected in sterilized glass bottles as per standard sampling methods. Chemical and bacteriological tests were performed on the selected samples to study their suitability for drinking. The parameter studied were colour, odour, teste, pH value, turbidity, total solids, total hardness, ammonia, nitrite, nitrate, alkalinity, calcium, magnesium, sulphate, chloride, iron, manganese and coliform organism.