10.22376/ijpbs.2019.10.1.p1-12 Volume 6 Issue 1 2015 (January - March) The Physico-chemical characteristics of tannery effluents from four different stations, Ambur(latitude of 12.78 lessThan sup greaterThan o lessThan /sup greaterThan N and the longitude of 78.7 lessThan sup greaterThan o lessThan /sup greaterThan E); Vaniyambadi (78 lessThan sup greaterThan o lessThan /sup greaterThan -35 lessThan sup greaterThan o lessThan /sup greaterThan and 78 lessThan sup greaterThan o lessThan /sup greaterThan –38 lessThan sup greaterThan o lessThan /sup greaterThan North latitude and 12 lessThan sup greaterThan o lessThan /sup greaterThan –42 lessThan sup greaterThan o lessThan /sup greaterThan East longitude); Dindigul (latitude of 10.35 lessThan sup greaterThan 0 lessThan /sup greaterThan N and the longitude of 77.95 lessThan sup greaterThan 0 lessThan /sup greaterThan E ); Ranipet (latitude of 12.942 lessThan sup greaterThan 0 lessThan /sup greaterThan N and the longitude of 79.323 lessThan sup greaterThan 0 lessThan /sup greaterThan E ) were compared. In stations other than I and III the effluents were alkaline. In station I, the TDS, BOD and COD were comparatively higher. The effluent collected from station I differed significantly from the effluent collected from other stations with reference to the different physico-chemical characteristics based on Tukey Comparision. P.SIVAKUMAR, M. KANAGAPPAN AND S. SAM MANOHAR DAS Tannery effluents, BOD, COD, Dissolved Oxygen, Chromium 446-451