Current problems of delivering high quality drinking water
to the population of St. Petersburg

Summary

The results of studies carried out by the experts of SUE «Vodokanal of St. Petersburg» and Centre for hygiene and epidemiology within the frames of Work program of water quality process inspection for the purpose of public health monitoring are presented. Monitoring the quality of drinking water delivered to the population of St. Petersburg and its surroundings is carried out for 86 parameters in 174 control points at every stage of water treatment with regularity from daily to monthly. Analytical drinking water quality control was carried out with the use of advanced methods and equipment. To evaluate the efficiency of the measures for delivering epidemiologically safe drinking water to the population an «infectious hepatitis» morbidity rate was introduced. The results of social-hygienic monitoring show sustainable long-term improvement of water quality parameters and the tendency for population morbidity decrease. The following measures for ensuring safe drinking water supply have been developed: introduction of UV drinking water disinfection; use of two-stage drinking water disinfection with the combination of physical and chemical methods; conversion to disinfection with sodium hypochlorite and ammonia sulphate; introduction of water source quality biomonitoring and sorbent dosing systems; construction of an advanced water treatment line. The comprehensive approach to drinking water quality monitoring allowed to develop the Concept of delivering physiologically adequate drinking water to the St. Petersburg population and give an objective estimate of the water supply services with account of the assessment of consumer’s risk and full-value of water.

Key words

potable water , sanitary-epidemiologic inspection , monitoring system , physiological full value of water

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