Mandatory control data for the specific volume activities of uranium and radium in the surface waters in the area of a uranium mine near Sofia city are presented. The average annual values for different points vary within wide limits and depend mainly on the natural dilution of the waters. The highest are contents in the drain waters, investigated below the dike of the waste depository; the lowest - in the region of Lesnovska river; the relationship is about 215:1 for uranium and 28:1 for radium. Maximal average annual values in the period 1980 - 1989 are registered for 1985 - 1987. The shallow underground waters also contain uranium and radium - about 1.6 - 134.0 mg/l and 16 - 125 mBq/l. Although their radiological parameters are up to the standards for drinking waters, due to the abnormal contents of sulfates, manganese, iron, copper and other heavy metals, these waters are used only for irrigation. 3 figs., 2 refs.