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Abstract-
The present study assessed the quality of the Yamuna River water for domestic purposes in the Agra region in terms of spatial variations in the physico-chemical and biological characteristics. The monitoring was done for the period of May-October 2014 representing pre-monsoon and post-monsoon sessions and considering five water quality parameters. The mean pH, dissolved oxygen, biological oxygen demand, total coliforms, and faecal coliforms in the four sampling sites were in the range of 7.69-8.38, 4.23-8.33 mg/l, 10.31-23.83 mg/l, 57111-168889/100ml, and 20375-56500/100ml respectively. Principal component analysis was used to identify the possible sources of contamination and to examine the spatial changes of water quality in the Yamuna River. The findings call for an immediate systematic management plan to protect these scarce invaluable water resources.