The concentration of mercury in nearby drain of health care units was studied during 2005-06. The enrichment of mercury in wastewater discharge from various hospitals / health care facilities (HCF) have been reported in the present study. The concentration of mercury ranges between Below Detectable Limit (BDL) to 0.02 mg/l. Maximum concentration of mercury reported in the wastewater coming from Priyadershani market area where cluster of HCFs are located and the drain near Sultania hospital. The concentration of Mercury in these locations were found twofold than the prescribed limit by the Central Pollution Control Board. In the second year of study the concentration mercury got reduced remarkably at all location due to precautionary measure taken by the hospital authority.