<p><span style="font-size:14px"><span style="font-family:Arial,Helvetica,sans-serif">Study of industrial effluents and underground water of Sitapura Industrial Area was carried out during monsoon season 2007. The main purpose of this study was to assess the quality of industrial effluents and its effects on the underground water. Waste water samples were collected from 4 textile, 4 pharmaceutical, 4 printing, 4 food products industries and 3 samples of mixed effluents. Underground water samples were collected at both sites of the nala and nearby different industries. These samples were analysed for the parameters of pH, Electrical Conductivity, Total dissolved solids, Total suspended solids, Total solids, Sodium, Potassium, Chloride, Nitrate, Hardness, Alkalinity, Sulphate, Phosphate, Fluoride, Dissolved Oxygen, Chemical Oxygen Demand. The pH value varied from 6.3 to 8.6 and EC value varied from 1.0 to 3.3 mmho/cm in the industrial effluent. The pH value varied from 7.16 to 9.52 and EC value varied from 1.08 to 3.3 mmhos/cm in the underground water samples. The COD value were found to be from 110 mg/L to 710 mg/L in the industrial effluents.</span></span></p>