Drinking water quality in Zelenodolsk District and the health status of the child population

Abstract

Indicators of total hardness (from 1.4 to 1.9 times the norm), concentrations of iron (from 1.1 to 2.2 times) and manganese (up to 1.2 times) remain stably high in the Zelenodolsky district as a whole. During the whole observed period, nitrites and polyphosphates, which should not be present in drinking water, were detected, though in small amounts. Organoleptic indicators deteriorated, although they do not exceed standard annual averages. This is probably due to some increase in dry residue, sulfates and chlorides, are able to change the taste and smell even when reaching half of the normative values.

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