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THE IMPACT OF THE DRINKING WATER HARDNESS ON THE MORBIDITY RATE OF THE POPULATION OF THE CITY OF OREL


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Abstract

The population of the city of Orеl consumes drinking underground water of Zadonsko-Optuhovsky and Voronezh-Livny aquifers. The total hardness of water from these sources often exceeds the maximum allowable concentration. Although high water hardness is considered mainly in terms of changes in organoleptic and consumer properties of water, we cannot leave without attention its impact on the health of the population with increasing frequency of diseases of the circulatory system, digestive tract, the urogenital and musculoskeletal systems, the prevalence rate of diabetes and cancer. The purpose of this work is to identify relationships increased total hardness of potable water and prevalence rate of non-infectious diseases of the Orel population. In performed studies there was used the correlation analysis. For the period of 2007-2014, correlations between reliable direct drinking water hardness and the overall morbidity rate of children and adult populations, as well as with diseases of respiratory organs, gall bladder and biliary tracts of children, ischemic heart disease, cerebrovascular diseases and diabetes mellitus of adults were identified. When the average annual levels of hardness are within 8.68-9.48 mg-eqv/l correlation coefficients amounted to 0.7-0.86 with accuracy <0.01- <0.05. In the teenage cluster reliable indices of the dependence of prevalence rate on the total water hardness not been identified. Apparently, identified correlation relationships are causal in nature, which is illustrated in similar results obtained in the Tambov region, Tula region and the city of Tula, where underground water with high hardness is also used for the population water supply. Obviously, we should be more careful about hygiene evaluation of drinking water with increased hardness, considering its possible etiological link with morbidity rate of the population.


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