The existence of a close relationship between the morbidity of population and the quality of water supply and air was noted a long time ago. In recent years, there is an acute crisis in the freshwater system, including drinking water. According to the World Health Organisation (WHO), infectious morbidity of population, associated with water supply, comes up to 500 million cases per year. These data give reasonable grounds for calling the problem of water supply with pathogen-free drinking water in sufficient amount as the worldwide problem number one. For validation the hygienic standards of drinking water quality, comprehensive complex studies are carried out. The main indicators of drinking water quality are divided into several groups. The group of organoleptic indicators (aftertaste, smell, colour and turbidity) can be assessed by the population, who consume drinking water. The sociological study on the population's assessment of the quality of tap water and air was conducted. The analysis of chemical content of water and air was carried out, and the risk levels were assessed. Keywords: zoning, quota sample, level of pollution, water quality, level of pollution, risk.