Groundwater is the most preferred source of water in various user sectors in India on account of its near universal availability, dependability and low capital cost. The present study mainly focus on the drinking water quality index of one of the fast growing city of India, Patna. The city has a population of 58.3lakhs of people which mainly relay ground water for drinking. The ground water from fourteen stations was analysed.

The present study has been undertaken to evaluate the performance of wastewater treatment systems (WWTS) in three different districts (Kolkata, Howra and Hugli) in West Bengal, India. Performance of these wastewater treatment plants are essential parameter to be monitored as the treated effluent is discharged into River Ganga which is the National River of India. The performance evaluation will also help for the better understanding of design and operating difficulties in wastewater treatment plants.