Abstract
The article studies the public health potential risk originated from water consumption and estimated on the basis of the groundwater chemical composition. We have processed the results of chemical groundwater analysis in different aquifers of Tomsk district (Tomsk Oblast, Russia). More than 8400 samples of chemical groundwater analyses were taken during long-term observation period. Human health risk assessment of exposure to contaminants in drinking water was performed in accordance with the risk assessment guidance for public health concerning chemical pollution of the environment (Russian reference number: 2.1.10.1920-04-M, 2004). Identified potential risks were estimated for consuming water of each aquifer. The comparative analysis of water quality of different aquifers was performed on the basis of the risk coefficient of the total non-carcinogenic effects. The non-carcinogenic risk for the health of the Tomsk district population due to groundwater consumption without prior sanitary treatment was admitted acceptable. A rather similar picture is observed for all aquifers, although deeper aquifers show lower hazard coefficients.
Highlights
In the world the issue of safe drinking water supply is of specific relevance
The article studies the public health potential risk originated from water consumption and estimated on the basis of the groundwater chemical composition
We have processed the results of chemical groundwater analysis in different aquifers of Tomsk district (Tomsk Oblast, Russia)
Summary
In the world the issue of safe drinking water supply is of specific relevance. Water is one of the key environmental components destined to permanent contact with human body. The major part of different substances, both necessary for life and toxic ones enters human body with drinking water. Patterns of human exposure to the factors contaminating the environment, at low rates, are still poorly studied. They can be both direct and indirect. The settlements are supplied with water both from central system with preliminary water treatment and individual wells (approximately 19.7% of the district population have individual water sources) [4], [5]. Over the study area four aquifers are distinguished – NeogeneQuaternary, Paleogene, Cretaceous, Paleozoic, the waters of which are used by population to greater or lesser extent for drinking and living needs. Concentrations, often exceeding the maximum allowable concentration, which is explained by some subjective and objective factors
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