Estimation of water quality in decentralized water supply sources of Vladimir

Summary

The effect of drinking water chlorination on its organoleptic properties posing a threat to the public health is considered. The water sanitary measurements, the compliance with the requirements to its physiologic adequacy, integral toxicity of the water in the decentralized water supply sources of Vladimir were studied. It was stated that water in all three investigated objects used by the population as alternative drinking water sources was physiologically adequate in relation to the concentration of macroelements and complied with the sanitary chemical requirements of SanPiN 2.1.4.1074-01. As for the concentration of microelements (fluorine and iodine) water in all the investigated objects was not physiologically adequate and did not meet the sanitary and hygienic requirements. The concentration of fluorine in the investigated sources of decentralized water supply and in drinking water of the Nerlinskii water intake varied from 0.1 to 0.3 mg/dm3 what was much less than the lowest limit of the physiologic adequacy and MPC. Iodine in the investigated sources was not detected. In some springs and wells of Vladimir nitrates were detected in concentrations much higher than the MPCs for drinking water. Water in two springs in Vladimir showed hypotoxicity for small crustaceans Daphnia magna Sr. what evidenced the presence in them of trace concentrations of toxic substances hazardous to health.

Key words

potable water , toxicity , physiological full value of water , decentralized water supply source , sanitary chemical indicators

The state of underground sources and public water supply systems of the Oryol Region and measures to improve the water quality

Summary

The state of the water resources inventory of the Orеl Region including underground and surface sources of water supply, is considered. The main causes of unsatisfactory water quality in public water supply systems are specified. To assess the quality of groundwater and water in water distribution networks in terms of microbiological and sanitary-chemical indicators, a method based on the filtration of a certain volume of water through membrane filters with subsequent identification by biochemical properties was used. The state of the underground sources of public water supply systems and distribution networks in the districts of the Orel Region for 2019–2021 is considered for compliance with the regulatory requirements. A number of measures have been proposed in order to implement the regional program «Improving the quality of water supply in the Orel Region» to improve water supply in the Region.

Key words

water supply system , ground water , microbiological characteristics , water object , centralized water supply system , sanitary chemical indicators