The mines of Zajača are located in western Serbia near the border with Bosnia and Herzegovina, and have been an essential source of Serbian Antimony production ever since 1890. The factory is situated in Zajača village (700 inhabitants) just 100-700m away from houses and the village primary school. Most citizens of Zajača are employed at the mine. In 2006 the mines and a smelting factory were privatized by the Serbian company Farmakom mb that focused its work on recycling and refining old lead. Between 2006 and 2011, the annual production of Zajača has increased from 4,000 tonnes to 26,000 tonnes of crude lead. In 2007, Farmakom mb installed air filters; however the environmental inspection closed the factory two times in 2007 and 2008 because of air filter failure. The factory emits air with high lead concentrations, which has lead to lawsuits in which the judge made the factory pay a monetary fine. Besides, the company has a historical dump site of antimony production, and a new dump site from lead refining, that are as well sources of pollution to village Zajača. Zajača citizens claimed that the manufacturing endangers their health. In the summer of 2011, n a citizens' request , laboratories in Serbia and Brussels did a medical investigation to measure lead concentration in children's blood, which showed an excess of lead concentration of 50-150% of the maximum allowed concentration.