Environmental monitoring of drinking water quality of Birsk central water supply

This paper examines effects of drinking water components, namely calcium and magnesium ions on the human body as well as it lists the main diseases that occur with prolonged use of hard water. Kostarevsky water intake is described as the only source of centralized water supply of the city. The paper contains data of ecological monitoring of drinking water taken from Kostarevsky water intake in Birsk from 2015 to 2017. The authors compare drinking water in Birsk and some other cities of the Republic of Bashkortostan. The chemical composition of the water was determined by titrimetric, gravimetric, colorimetric, organoleptic, and microbiological methods of investigation. The results of the analysis show that the water given to the population of Birsk along the central water supply line is microbiologically favorable. The chemical composition of water almost in all respects meets the requirements of Sanitary Regulations and Standards 2.1.4.1074-01 «Drinking water. Hygienic requirements for water quality». However, the analysis results show that the rigidity of the water exchange is beyond the permissible limit of the norm, which can adversely affect the health of the population. The results obtained during the work can be useful for further ecological monitoring of drinking water in Birsk, Republic of Bashkortostan.