this situation pertains to about per cent of the municipalities of vojvodina which are using wells for public water supply and about per cent of the total population of the autonomous province arsenic removal from drinking water requires significant financial resources and specific units of water treatment which are necessary to develop an appropriate plan to address this problem according to data from the institute of public health of belgrade city in the physicochemical and microbiological parameters were controlled in samples of which per cent did not meet physicochemical parameters and per cent did not meet microbiological parameters beogradvode also controls water quality through analysis of an additional or so samples per year but results are not known since it has no obligation to submit them