Physicochemical parameters of water samples collected from various rivers in India. Water samples under investigations were collected from Krishana Vijaywada, Gomti Lucknow, Hoogali Kolkata, Ganga Kasi, Mahanadi Katak, Cauveri river Tiruchirapalli station during (July - August) seasons in the year 2009. The different sites show significant enrichment with Zn, Fe, Ni, Cr, Ca and Mg indicating input from industrial sources. The observed values of different physicochemical characteristics like pH, temperature, turbidity, total hardness (TH), iron, chloride, total dissolved solids(TDS), Ca2+, Mg2+, SO42-, F- total alkalinity (TA), COD, BOD, phosphate, FRC (Free residual chlorine), total silica and hydrazine of samples were compared with standard values recommended by Bureau of Indian standard (BIS).