eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences December 2009 21 3 595 598 jusps-B 1174 article Sujata Dubey 1 A.K. Gupta 2 D.V. Singh 1 Department of Botany, Udai Pratap Autonomous College, Varanasi (U.P.) INDIA - 221002 Shri Baldev Post, Graduate College, Baragaon, Varanasi (U.P.) INDIA <p style="text-align: justify;">Varanasi (25⁰18&#39; N and 83⁰1&#39; E) is an ancient city situated on the left bank of river Ganga. Various physico-chemical characteristics of river Ganga flowing inVaranasi were studied in the summer, winter and rainy seasons. Ecological parameters like Dissolved Oxygen (D.O.), pH, Nitrate, Phosphate, Biochemical Oxygen Demand (B.O.D.) and Temperature were analyzed and compared with standard permissible limits to assess the best designated use of the river water for various purposes. The important sources of pollution in the river Ganges include discharge of raw sewage at different Ghats, the disposal of dead animals and human bodies, the garbage coming from household activities, discharge of faecal matters etc. Raj Ghat is the main sewage disposal point of the Varanasi city.</p> <p style="text-align: justify;">The physico-chemical analysis shows higher value of B.O.D. and lower value of D.O. at Raj Ghat and Assi Ghat. Ganges water was found to be rich in Nitrate and Phosphate contents, Dissolved Oxygen and Biochemical Oxygen Demand were found to be two important parameters, which showed strong correlation with several other parameters and hence can serve as good indices of river water quality.</p> <p style="text-align: justify;">&nbsp;</p> https://ultraphysicalsciences.org/paper/1174/ Water quality parameters Ganga water pollution.