Hygienic assessment of monitoring results of bottled potable water and potable water after tertiary treatment from points of bottling

Abstract

Conducted research gave positive assessment of changes in the quality control procedure of bottled potable water and water from points of bottling, what is the pledge of safety for the health of consumers after the enforcement of DSanPin 2.2.4-171-10 “Hygienic requirements to potable water intended for human consumption”, and also to indicate the need for amendment in this document regarding the methods of treatment of natural waters , procedure of conducting the research of source water for production of the bottled potable water and water from points of bottling, prohibition of potable water production with dry residue less than 100 mg/l after demineralization, procedure of production control of trihalomethanes content for tertiary treated potable water from surface sources of potable water supply. It was for the first time when was developed and graphically presented the algorithm for production of different types of bottled potable water and water from points of bottling, developed the list of methods of treatment of natural potable waters considering the EU legislative requirements. It should be excluded purification of natural drinking water by methods using reagents. It was found that drinking water "with optimal content of minerals" is practically not produced. It was determined that among the 129 samples of potable water from points of bottling and bottled water after the direct installation of equipment or after their long production, 57% of samples didn’t meet the hygienic requirements, including the hygiene and chemical indicators, which have the hygiene and toxicological indication of hazard. Depending on the frequency of not meeting the hygienic requirements, indicators of potable water quality can be placed in the following row: chloroform and other THMs > dry residue > permanganate demand > color > ammonium and nitrates > phenols > hydrogen ion exponent, silicon, sodium, chlorides, iodine ( for the potable waters produced from the tap water); silicon > dry residue > color > nitrates > alkalinity, manganese, hydrogen ion exponent, total hardness, turbidity > total iron > fluorine, permanganate demand, nitrates (for the potable waters produced from the groundwater).In case of inopportune amendment to the water treatment technology, potable waters of indicated quality are hazardous for the health of consumers.