The village of Dubravica is partially located over the western lignite
deposits of the Kostolac basin. The examination of the dry residue obtained
from drinking water from two individual wells by X-ray diffraction analysis,
based on a typical peak, showed the presence of uranium in drinking water.
The indirect method by Rajkovic and associates showed that, in sample I, the
concentration of uranium in drinking water was 85.5 percent higher (3.71
?g/L) and that the concentration of uranium in sample II was only 22 percent
lower (1.56 ?g/L) than the Maximum Allowable Concentration (MAC) values
required by the Regulations (2 ?g/L). Analysis of the result of the
introduction of uranium in the human body has shown that this way brings
0.84 to 2 mg of uranium in the human organism per annum or 0.09 to 0.22 mg
of uranium is deposited annually in the kidney. Assessment of the potential
health risk due to the presence of uranium in drinking water indicated that
the population using drinking water from wells will be threatened by uranium
in a short time interval. Regarding the long-term risk, the calculation has
indicated that in the first sample of drinking water, about 25 inhabitants,
and in the case of the second sample of drinking water, 10 inhabitants out
of 1000 inhabitants are endangered. As the kidney is the organ in which
uranium is deposited (accumulated) to the greatest extent, its presence
causes weakening and failure of kidney function, which can destroy 75
percent of kidney function until the manifestation of the first clinical
symptoms. This phenomenon is observed among the population along the rivers
the Kolubara, the Drina, the Sava and the Morava and is called endemic
nephropathy. The elements found in trace amounts (Pb, Cd, Si), live agents
(bacteria and viruses), fungal plant toxins, genetic factors and immune
mechanism can be listed as possible causes. However, uranium in drinking
water has not been listed so far. The tests performed in this study clearly
show the role of uranium in the epidemic, endemic nephropathy, which is
growing and which is not at the acute phase of the disease but has already
progressed to renal failure and end-stage kidney disease. Official data on
the rise of endemic nephropathy and diabetes and increasing their share in
diseases, as well as overall mortality rates, which amount to 18.19%,
clearly indicate that the role of uranium in the Branicevo district
environment should not be ignored. Since there are settlements on the
terrain to be investigated, uranium and its migration through the
environment must be monitored as all conditions for its migration are
unfortunately favourable.