Abstract
Pollution of water bodies as a result of natural and anthropogenic activities presents a global problem. The article analyzes the ecological and chemical state and balance in terms of biogenic macro- and microelements of water bodies of non-centralized water supply in the northwestern part of the Vologda region. The study examines the water in 7 rivers, 5 lakes and 4 springs of the Districts of Vologda, Vytegra, Belozersk, Vashki and Kirillov. Based on the composition analysis of the samples taken, the research shows that the water used does not meet the regulatory requirements in terms of turbidity, color, fluoride ion, total iron, chemical oxygen demand (COD). According to microbiological indications the water from the studied sources does not meet the sanitary and hygienic standards in terms of the total coliform bacteria and the total microbial count (TMC) in rivers and lakes. The most polluted rivers for all the indicators considered are the Komela and Kema. The evaluation of the samples according to the physiological usefulness and balance of the chemical composition reveals that water is mainly assessed as well-balanced in terms of biogenic macro- and microelements content being chloride-hydrocarbonate calcium and magnesium-calcium.
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