The concentration of lead, cadmium, zinc and copper in egg’s content of hens housing in free range system (18 farms), in copper industry region, between 1997 and 2003 was determined. In that time twice decrease, statistically significant, of lead concentration (to 0,0646 mg kg^-1 f.m.) and increase of copper concentration (to 0,66 mg kg^-1 f.m.) has been examined. The content of cadmium and zinc did not change significantly during the investigation. The concentration of cadmium and lead was over the permissible limit occasionally, however the concentration of copper and zinc was on average level or lower, comparing with data from literature. The last two elements are not limited (Cu from year 2000 and Zn from year 2003) in the polish legislation concerning food safety.

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